RAW VIDEO: Another Night, Another Black On Black Mass Shooting, This One In Philladelphia Leaving 11 Shot, 3 Dead

PHILADELPHIA (WPVI) -- Three people died and 11 others were wounded in a shooting late Saturday night on Philadelphia's South Street.

The gunfire erupted around 11:31 p.m. on the 400 block of South Street -- a bustling area in the city's Queen Village neighborhood.

Authorities say officers assigned to the 200 block of South Street heard the initial gunfire and quickly responded. Upon arrival, officers found several gunshot victims and an unknown man firing into a crowd of people, said Philadelphia Police Commissioner Danielle Outlaw during a Sunday afternoon briefing.

One officer pulled out his weapon and fired several times in the direction of the gunman. Police say the gunman fled, but it's believed he was hit by the officer's gunfire.

he discharging officer is a three-and-a-half-year veteran of the Philadelphia Police Department. He is assigned to the 18th District. As per protocol, the officer has been placed on administrative duty pending the outcome of the investigation.

Outlaw said the dead were a 34-year-old man, a 27-year-old woman and a 22-year-old man. Investigators believe one of the three killed was involved in "a physical altercation" with another man, and those two began firing at each other, with both struck by gunfire and one killed, Outlaw said.

The two other people killed and a number of other shooting victims, who ranged from age 17 to 69, are believed to have been innocent bystanders, Outlaw said. She called it "a dark day" for the city when many people out enjoying a beautiful day were victims of "horrendous and unthinkable acts ... in a very popular local and tourist hangout."