A teen boy is dead after officials said he was shot on a SEPTA bus in West Philadelphia following an altercation at the rear of the bus.

Investigators said that the juvenile fired a single shot back into the bus, which hit a 15-year-old boy in the chest. The teen was brought to Penn Presbyterian Medical Center where he was pronounced dead just after 1:15 p.m. No one else on the bus was injured, the SEPTA spokesperson said.