By John Miller and Danny Freeman | CNN
Four people are in custody and multiple firearms have been recovered after a shooting in West Philadelphia Wednesday afternoon, two sources with knowledge of the incident told CNN.
Multiple people were reported injured, a law enforcement official told CNN.
Reports of a shooting prompted a massive police response into the area near the Clara Muhammad Square around 2 p.m., the official said.
Police believe two groups exchanged gunfire on the street.
At least one officer fired shots at a gunman, the official said.
Two victims were rushed by police to Penn Presbyterian Medical Center with gunshot wounds, and one of them is considered a possible suspect, the official added.
The hospital reported to police that three other gunshot victims showed up there, according to the official.
The Bureau of Alcohol, Tobacco, Firearms and Explosives responded to the shooting reports and is on the scene, a spokesperson said.
This is a developing story and will be updated.