Police are investigating a mass shooting on the 1500-block of South 27th Street that left nine people injured and three dead. Officers from Philadelphia Police Department's Shooting Investigation Group say nine of the victims were taken to Penn Presbyterian Medical Center and three to Children's Hospital of Philadelphia.

A BART spokesperson said Antioch police were assisting BART police with an investigation into the shooting, which took place about 8:15 p.m. The injured adult was taken to a local hospital with injuries that weren’t considered life-threatening, the spokesperson said.

Metropolitan Police Department Chief Chris Bailey said "parents and guardians have got to step up. A kid is dead tonight."