Update as of 7:01 a.m.: Police have arrested a 17-year old in connection with the shooting of three people in a Pittsburgh-area mall Saturday, according to reports.

The man, identified as Tarod Thornhill, was charged with aggravated assault, attempted homicide, and recklessly endangering other people, according to ABC News.

Detectives said they used social media and surveillance video to aid in their arrest, WPXI reported. Two of the three people wounded in the shooting remain in critical condition at a local hospital, the station added.

Original story below:

A manhunt was underway for a gunmen who wounded three people, two critically, at a shopping mall outside Pittsburgh Saturday. The shootings took place at Macy's at the Monroeville Mall in Monroeville, Pennsylvania.

Police said the shootings occurred at 6:30 p.m. and no suspects were in custody as of 10 p.m., Trib Total Media reported. The shots sent shoppers scrambling. KDKA, Pittsburgh, reported the shooting was the result of a gang fight. Police armed with shotguns from 14 departments responded to the scene, and the FBI helped evacuate patrons.




The injured were taken to Forbes Hospital and Trauma Center where two patients were in critical condition and one was in fair condition, a hospital spokesman said. The Associated Press reported all suffered gunshot wounds. The hospital's emergency room was placed on lockdown since the shooter or shooters had yet to be apprehended, the spokesman said.

Witnesses described the scene as "chaos."

“I grabbed my friend, and said, ‘Let's go,' and said, ‘We're out of here,'” Mitchell Swann, 18, of Rankin told the Trib.

Yvette Jackson, 38, of North Braddock said she was attending a birthday party at Giggles and Smiles, a children's play center, and those at the facility were locked in for 45 minutes until police let them out.

"All of the sudden we heard people screaming, and the next thing you see is a bunch of people, teenagers, scared to death, just exodus en masse in a way you could not believe. I grabbed my children, husband, we started screaming 'go, go, go!'" Athena Coffey of Churchill told KDKA.

Former NFL quarterback Terrelle Pryor tweeted he witnessed the incident.

"Damn was just in monroeville mall and just saw 2 ppl get shot," he tweeted. "They are letting guns go in there."

The incident comes about six weeks after a brawl involving waves of teenagers who rushed from one fight to the next. Two teens were injured in that incident, which prompted mall officials to beef up security on Friday and Saturday nights. Four police officers were stationed at the mall Saturday night.