A shooting in Philadelphia on Saturday left three people dead and at least 12 others injured in a crowd of hundreds, authorities said.
The shooting broke out at approximately 11:31 p.m. on South Street, a popular nightlife area in the city, The Philadelphia Police Department said in a press conference on Sunday.
Commissioner Danielle Outlaw said officers heard multiple gunshots near South Street, and when they arrived on the scene, they "observed several civilians suffering from gunshot wounds lying on the sidewalk and in the street."
Eleven people were struck by gunfire, the commissioner said. An additional victim was struck by shattered glass, NBC10 Philadelphia reported.
Outlaw said one officer observed an "unknown male on the southwest corner of South and American Street, firing a handgun into a large crowd on the 400 block of South Street, from approximately a half a block away."
"The officer drew his weapon and fired several times in the direction of the unknown male, we believe, striking him. The unknown male dropped his handgun on the sidewalk and ran southbound on 600 American Street. The male was then lost in the area," Outlaw said.
Authorities believe one of the male decedents was involved in the shooting, although Outlaw did not specify who.
"At this time, we believe that one of the three decedents was a male involved in a physical altercation with another male that was potentially the genesis of the shooting. These individuals eventually began firing at one another with both being struck, one fatally," Outlaw said.
She added that police believe the two other decedents and the other shooting victims were "uninvolved in the initial altercation" and were "innocent bystanders."
The 11 shooting victims who survived were identified by NBC 10 Philadelphia as a 17-year-old boy, two 17-year-old girls, two 18-year-old men, a 19-year-old woman, two 20-year-old men, a 23-year-old man, a 43-year-old man, and a 69-year-old man. Outlaw said their conditions ranged from stable to critical.
Investigators said they are assembling video and witness evidence, but they believe there were additional gunmen who fired "several" rounds, although they did not specify how many.
This is what we know about the victims who died.