Two men are in the hospital after a double stabbing in Center City Sunday night.

Police say an 18-year-old man and a 21-year-old man were on Broad and Arch streets around 6 p.m. when they were attacked by an older man armed with a knife. Neil Lee, a witness, told NBC10 the man swung his knife wildly at the two younger men. The 18-year-old was stabbed in the right hand while the 21-year-old was slashed across the chest, investigators said. Responding police officers quickly apprehended the suspect and took him into custody.

"The officer showed up just in time," Lee said.

 Both victims were taken to Hahnemann Hospital where they are in stable condition.

Investigators have not yet released the suspect's identity or a motive in stabbing. Witnesses say it started with an argument however.

It was the third reported stabbing incident in Philadelphia Sunday. Early Sunday morning a man was stabbed and killed in the Rittenhouse Square area. A homeless veteran was later arrested in connection to the stabbing. Late Sunday morning a 52-year-old man was stabbed inside a North Philadelphia house. He's currently in critical condition.

A 52-year-old man was in critical condition Sunday after police say someone he knew stabbed him inside a North Philadelphia house overnight.

Police said they hadn't yet made an arrest late Sunday morning, but they knew who they were looking for in connection with the stabbing.

The victim was stabbed three times -- once in the left shoulder and twice in the lower back -- inside a house on 18th Street near Stiles.

It's unclear what motivated the stabbing.

New video has surfaced reportedly showing an actor from the popular sketch comedy series “Chappelle’s Show” in a fight outside a Philadelphia restaurant.

TMZ reports actor and comedian Donnell Rawlings was involved in an altercation outside Little Pete’s on South 17th Street Sunday morning. A video obtained by TMZ shows Rawlings, 45, fighting with two men outside the restaurant. A woman then screams at Rawlings, telling him to leave.

A Little Pete’s employee told TMZ the fight stemmed from the fact that Rawlings was walking out without paying his tab.

“All I asked was for you to pay your check,” the woman in the video screams. “Who the hell do you think you are?!”

Rawlings told TMZ however that he only went out for a smoke and was planning on going back inside to pay but claimed a waitress followed him outside and started screaming at him before he got the chance. TMZ reports police were called to the scene and Rawlings ultimately paid his $12 bill and even left a $60 tip. No arrests were made in relation to the incident.

NBC10 reached out to Little Pete’s for comment but they declined to speak on the incident. We also reached out to Rawlings for comment but have not yet heard back.

Rawlings’ girlfriend Stephanie George addressed the incident on her Instagram page Sunday.

Rawlings also tweeted about the incident.

Rawlings was in Philadelphia to perform at the Helium Comedy Club on the 2000 block of Sansom Street. He had another show Sunday night. The Washington, DC native is a radio host, actor and comedian best known for his roles on the popular sketch comedy series “Chappelle’s Show,” including “Ashy Larry.” He also appeared on the MTV2 shows “Guy Code” and “Guy Court.”
 
 

More than 50 dirt bikes and ATVs are now in the Philadelphia Police impound lot after a citywide crackdown Sunday.

Police announced they seized 53 vehicles Sunday, two of which were allegedly stolen. They also announced one man from Camden, New Jersey was arrested during the crackdown and charged with felony fleeing.

“We have people who die from these every year and it’s very dangerous for people walking on the sidewalks when they come ripping up and people have to dive out of the way,” said Philadelphia Police Chief Inspector Dennis Wilson. “That actually happened today around Levick and the Boulevard. That’s part of the reason that guy was arrested.”

Despite being illegal on city streets, dirt bike riding and ATV riding are popular activities in Philadelphia, especially during the spring and summer months. During Sunday’s press conference, police said they wanted to conduct the crackdown earlier this year ahead of the warmer weather. 
 

March Madness is finally here and Villanova, Temple and St. Joe's are going dancing.

The Wildcats earned the No. 2 seed in the South Region and will play No. 15 UNC Asheville (22-11) on Friday in Brooklyn. Jay Wright's squad had a golden opportunity to wrap up a No. 1 seed, but was upset by a hot Seton Hall team in the championship game of the Big East Tournament.

Temple, the No. 10 seed in the South Region, will tip off against No. 7 Iowa (21-10), also on Friday in Brooklyn. If both Villanova and Temple take care of business in the second round, the two will face off in the third round. Villanova routed Temple, 83-67, in the only matchup between the two teams this season.

With Villanova playing in the South, it will not have the opportunity to play Sweet 16 or Elite Eight games in Philadelphia at the Wells Fargo Center.

St. Joe's, winners of the Atlantic 10 championship, earned the No. 8 seed in the West Region and will face No. 9 Cincinnati (22-10) on Friday in Spokane, Washington. The Hawks finished the year with a 27-7 record.

Villanova's seeding was up in the air following its Big East championship loss to Seton Hall on Saturday night. Villanova entered the game as the third-seeded team in the nation, but the loss hurt its chances for a No. 1 seed. The Wildcats finished the regular season with a 29-5 record and will look to rebound from their Big East championship loss.

Last year, Villanova received the No. 1 seed in the East Region, but was unable to make it past the third round, where it fell to No. 8 NC State, 71-68.

Temple went 21-11 during the regular season, good enough for the best record in the American Athletic Conference, but lost out on a chance for an automatic bid during the AAC Tournament. The Owls fell to the streaking Connecticut Huskies in the semifinals. UConn received a No. 9 seed, also in the South Region, and will face No. 8 Colorado in the second round.

After being snubbed for the tournament last year, Temple made a deep run to the Final Four of the NIT Tournament in 2014-15, where the Owls lost a heartbreaker to NIT champion Miami.

St. Joe's most recent trip to the NCAA Tournament came in 2013-14, with the No. 10 Hawks falling to the eventual national champion Connecticut Huskies in the second round.

A Maryland police officer who was shot and killed outside a police station in Prince George’s county Sunday was originally from the Philadelphia area.

Prince George’s County narcotics officer Jacai Colson, 28, was shot in what investigators describe as an “unprovoked attack” outside the District III station in Landover, Maryland. 

Investigators say a gunman opened fire outside the front door of the station around 4:30 p.m. Sunday. Colson returned fire but was shot in the process. The 4-year veteran, who would have celebrated his 29th birthday this week, was taken to the hospital where he later died from his injuries. The alleged gunman was also shot during the incident but is expected to survive. He remains under police custody at an area hospital. A second suspect was also taken in for questioning. Charges are pending.

A member of the Upper Chichester Police Department confirmed with NBC10 that Colson was from Upper Chichester and graduated from Chichester High School in 2005. Sources told NBC Washington that Delaware State Police and Pennsylvania State Police will escort Colson’s family to Maryland.

Maryland Governor Larry Hogan ordered flags to fly at half-staff in honor of Officer Colson.

"The First Lady and I send our sincere prayers to the family and loved ones of Officer Colson, who made the ultimate sacrifice in service to his fellow citizens and community,” Hogan said in a released statement. “It is my hope that his proud legacy of commitment and passion for law enforcement and serving others will provide some comfort in the difficult days that lie ahead."

CLICK HERE for more details on the shooting and investigation.
 

Comedian Kevin Hart "smoked" Louisiana State University's Track and Field star Jada Martin in a hilarious race.

At least that's the version of the story Hart will be telling.

Hart challenged the two-time All-American to a sprint. In a video posted to LSU's Track and Field Facebook account, a man is heard saying "Ready, set" as Hart clearly takes off before the word "go" is uttered.

Martin quickly reacts, sprinting to catch up. But Hart is able to outpace her.

In a subsequent video, Hart taunts Martin with his win, telling her "100 thousand people just saw" him "smoke you from the start." [[371882642, C]]

The "Ride Along" star advises Martin to "work on her starts." Ouch. Hart-less.

The pint-sized funny man is no stranger to running. Hart is known for soliciting fans on social media to join him on spontaneous 5K jogs around cities in the U.S. during his stand-up tours. [[371882842, C]]

Here are the 10 things you need to know to start your day from your friends at NBC10.

TODAY'S TOP STORY

Homeless Vet Stabs, Kills Man in Rittenhouse: Police arrested a homeless veteran accused of stabbing and killing a man in downtown Philadelphia's Rittenhouse Square neighborhood after what witnesses described as an argument over sports teams. Police said they responded about 3 a.m. to 9-1-1 calls about a person with a weapon and a stabbing at 19th Street and Rittenhouse Square. The victim, a 24-year-old man from Bucks County, was walking with another man and two women when they were approached by a man they did not know, investigators told NBC10's Monique Braxton. Braxton learned at the scene that the victim and the attacker argued over sports teams briefly before the attacker pulled a knife and stabbed the man in the stomach. Good Samaritans and the victim's friends rushed to help him, taking off articles of clothing to try to stop the bleeding. Police said it appears that the man did not know the assailant and that he and his friends were approached by the person at random. Sunday night, police told NBC10 they arrested a suspect in the deadly stabbing. While they did not release his name, they said he is a homeless veteran who frequently stays in Rittenhouse Square.

• MORE ON THE STABBING

It's a rainy start to the Monday morning. Temperatures are expected to stay around the low 50s and rain is expected to last through most of the day. Tuesday could also see some morning showers but they would clear out by the afternoon. No rain is expected for Wednesday, which should see sun and temperatures near 70 degrees. But there is another chance of rain on Thursday. High Temp: 51 degrees. Get your full NBC10 First Alert forecast here.

WHAT YOU MISSED YESTERDAY

Police Seize 53 ATVs, Dirt Bikes: More than 50 dirt bikes and ATVs are now in the Philadelphia Police impound lot after a citywide crackdown Sunday. Police announced they seized 53 vehicles Sunday, two of which were allegedly stolen. They also announced one man from Camden, New Jersey was arrested during the crackdown and charged with felony fleeing. “We have people who die from these every year and it’s very dangerous for people walking on the sidewalks when they come ripping up and people have to dive out of the way,” said Philadelphia Police Chief Inspector Dennis Wilson. “That actually happened today around Levick and the Boulevard. That’s part of the reason that guy was arrested.” Despite being illegal on city streets, dirt bike riding and ATV riding are popular activities in Philadelphia, especially during the spring and summer months. 

• MORE ON THE CRACKDOWN
  

AROUND THE WORLD

Amtrak Train Derails in Kansas; Injuries Reported: An Amtrak train derailed in southwest Kansas, sending about 20 people to the hospital. An Amtrak statement says the train was traveling from Los Angeles to Chicago early Monday when it derailed just after midnight about 20 miles west of Dodge City. Kansas Highway Patrol communication specialist Patricia Munford says five train cars are on their side. Amtrak says about 20 passengers were brought to hospitals in Dodge City and Garden City. All others were brought to a recreation center and will be given alternate transportation to their final destination. Amtrak says the train consisted of two locomotives and nine cars and had about 128 passengers and 14 crew members on board.

• MORE ON THE DERAILMENT
  

First Olympian with Hijab to Make History: Ibtihaj Muhammad stood beaming on the podium in Budapest in 2013, flashing a bright smile, a world championship bronze medal and the red, white and blue hijab that perfectly encapsulated who she is as an athlete and a person. Muhammad, a New Jersey-born fencer, is a proud Muslim and an equally proud American. And this summer at the Rio Olympics, Muhammed will seek to stand up for her community by fighting for a country that hasn't always fought for those who share her faith. Muhammad, the middle daughter of a retired detective and special education teacher, will become the first U.S. athlete to compete in the Olympics while wearing a hijab, the head scarf required of Muslim women.

• MORE ON THE OLYMPIAN
  

SPORTS SPOT

St. Joe's basketball beats VCU: The St. Joe's basketball team celebrates an A-10 championship win. Get your full sports news at CSNPhilly.

PHOTO OF THE DAY

See more Top News Photos here.

THROUGH IGER'S EYES

@dentinator snapped this cool image.

Have an awesome Instagram photo you'd like to share? Tag it with #NBC10Buzz.

TODAY'S VIRAL VIDEO

How to "make" memories. Watch the full video here.

Tennis Hall of Famer Teaches Philly Students: International tennis Hall of Famer Nick Bollettieri taught some Philadelphia children important lessons both on and off the court. Bollettieri said a child's character begins to build with responsibilty, accountability, education and building a self esteem through tennis helps kids to be able to say no to drugs, alcohol and violence. Find out more about Bollettieri here.

That's what you need to know. We've got more stories worthy of your time in the Breakfast Buzz section. Click here to check them out. 

A United States senator will meet with those impacted by gun violence as he calls for action to be taken to curb gun attacks in America.

U.S. Senator Bob Casey (D-Pa.) will host an expert panel at Temple University School of Medicine in North Philadelphia at 10:30 a.m. Monday.

The goal of the round table event is "to hear from experts and families impacted by gun violence and explore how Congress can take commonsense steps to combat this problem and keep our communities safe," said a new release from the Casey camp.

Casey -- a two-term Democrat -- says his view of guns changed following the 2012 massacre of more than two dozen children and teachers at Sandy Hook elementary School in Newtown, Connecticut.

A car thief swiped a running minivan off a West Philadelphia street Monday morning, taking a 4-month-old with him for blocks.

Someone jumped into the white Town and Country minivan with a partial license plate of “JMX” at 49th and Walnut streets while the child’s father stopped into the 49 Stop Food Market corner store around 7:50 a.m., said Philadelphia Police.

The child later turned up miles away along W Penn Street near Greene Street in the city's Germantown section after someone called the child's father in the middle of the incident, said police.

The child was taken to Saint Christopher's Hospital for Children to be checked out by doctors.

Police continued to search for the van Monday morning after the car thief drove off. No word yet on a suspect description.

Monday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and equals 3.14... Last year, 3-14-15, was the only day this century that matched pi, commonly approximated as 3.14159. 

As is the case every year, schools and museums across the country have planned events to celebrate the concept, which has fascinated humans for centuries. Look for pi-related deals and freebies, too. 

If you want to earn 3.14 years of free pizza from Pizza Hut, all you have to do is answer three math problems. Easy? Not so much. The questions have been devised by famed Princeton mathematics professor John H. Conway and range in difficulty from high school to PhD level. Pizza Hut said it will award three winners, one for each question.

Whole Foods is also celebrating Pi Day by offering a discount on its pies and pizzas. You can get $3.14 off sweet pies, and $2 off their take and bake pizzas.

In the spirit of the holiday, here are 3.14 things you may not know about pi:

1. No one is certain who discovered pi as we know it today

But we do have some ideas. It seems that the Egyptians used pi in the construction of the Great Pyramid because when the perimeter is divided by its height, one gets a close approximation to 2π. It’s the same result if one divides the circumference of a circle by its radius.

But the most significant pi research might have come from the astronomer, Archimedes, around 250 B.C.

His mathematical calculation showed that pi was "between three and one seventh and three and 10 seventy firsts,” Steven Strogatz, an applied mathematics professor at Cornell University, told NBC in a 2015 interview. “He approached that putting a six sided figure into a circle, then made it 12 sided, and went all the way up to a 96-sided polygon.”

He proved that pi was found somewhere between these two numbers, which applied to all circles.

2. You can find your identity in pi

One myth is that since pi is a continuation of numbers, people’s identities can be found in the pattern: like social security numbers or birthdays.

This theory became popular when this meme appeared on George Takei’s Facebook:

But Professor Strogatz stressed that the meme is misleading.  Even if it is true (which is not yet known), the digits in pi would tell us nothing about a person's life or identity, because along with correct social security numbers and birthdays, there will also be wrong social security numbers and birthdays.

3. Proving pi with matches

You can prove pi exists with matches, toothpicks, a pen, or anything else that is the same length, explained Johnny Ball, the author of “Why Pi? (Big Questions).”

“There’s a wonderful way to find pi for yourself. You find a floor with parallel lines; you find matches, pins, pens, exactly the same length. If you drop a hundred of them at random on the floor, the points touching a line will equal pi,” Ball said.

The matches' length must be equal to the distance of the two parallel lines. After the matches are dropped, you multiply the number of matches thrown down by two and divide it by the total number of matches that touched a line, which will equal pi.

This problem was discovered in the 18th century by French mathematician Georges-Louis Leclerc, Comte de Buffon.

Check out this video on Dr. Tony Padilla's YouTube channel Numberphile where he demonstrates Buffon's Needle Problem:

3.14...Legislating against pi

In 1897, Indiana state legislators tried passing a Pi Bill that legally defined pi as 3.2. Edward J. Goodwin, a physician, convinced a well-known mathematical monthly newspaper that he had solved what mathematicians had tried to do for generations: squaring the circle. Simply put, squaring the circle is the impossible task of finding the area of a circle by finding the area of a square around it. Goodwin claimed that pi was 3.2 instead of a continuous number. The bill never became a law thanks to Professor C. A. Waldo who convinced the Indiana Senate that Goodwin’s discovery was not possible.

Philadelphia Police identified the man accused of stabbing and killing a Bucks County man during an argument over sports teams in Rittenhouse Square early Sunday.

Police said Steven Simminger, who hails from Media, Pennsylvania, stabbed Colin McGovern, of Churchville, Pennsylvania, after a verbal argument over Simminger's New Jersey Devils baseball cap escalated into a fight.

Police say McGovern, 24, got out of a cab with another man and two other women at 18th Street and Rittenhouse Square around 3 a.m. Sunday. They then walked past Simminger, 40. Police believe McGovern poked fun at the New Jersey Devils cap Simminger was wearing, which led to an argument between the two men. The argument then turned physical and Simminger pulled out a knife and stabbed McGovern in the torso, according to police.

Good Samaritans and the victim's friends rushed to help him, taking off articles of clothing to try to stop the bleeding.

"I took my jacket off, I knelt down beside him, lifted his shirt up and just started putting pressure on what was a stab wound that we saw on his stomach," said Megan Hellander, one of those Samaritans. "And I was just trying to kind of whisper in his ear that the ambulance was coming."

McGovern died a short time later at Hahnemann Hospital.

Simminger, arrested Sunday night, was orginally thought to be a homeless veteran who frequently stays in Rittenhouse Square, police said. It wasn't immediately clear if Simminger had an attorney.

A source told NBC10 Simminger went to the VA Hospital on Woodland Avenue because he was injured during the fight. Police told NBC10 they were able to identify him through surveillance video. They also say they found two knives in his possession during the arrest, one of which they believe is the murder weapon.

Simminger faces murder and related charges. Court records show he was previously arrested for DUI in Philadelphia and was also in court in Delaware County for a landlord dispute.

This stabbing came on the same day that four were hurt during a fight and stabbing at 13th and Arch streets and a man was stabbed in a home along 18th Street in North Philadelphia.

Several people suffered minor injuries after a SEPTA bus driver crashed into a bank in Philadelphia Monday afternoon.

The Route 55 bus was traveling on Old York Road and W. Nedro Avenue around noon when the driver lost control and hit a PNC Bank building. No one was outside the bank at the time of the crash.

Officials say seven to nine passengers suffered non-life-threatening injuries during the accident. Investigators have not yet revealed what caused the driver to lose control.