Shortly before 2 p.m. Wednesday, a southbound Broad Street Line train had pulled into the Susquehanna-Dauphin station in North Philadelphia when a male fired a gun from the platform into the car, which was packed with teenage students.
Video surveillance shows an altercation on the train between two groups of teens, police said. It starts verbally, then escalates to pushing and shoving.
When the train stops, the 15-year-old and several companions get off, police said.
The teen then walks to the next set of doors and opens fire into the car, police said. The teen and his companions then run out of the station.
A 17-year-old Fels High School student was shot in an arm and a 14-year-old Hartranft School student was shot in a leg, police said.
Both were transported to nearby Temple University Hospital. The older teen has been released from the hospital. The younger victim is still in critical condition, police said.
A SEPTA spokeswoman said that each train car is equipped with 10 to 12 surveillance cameras. Subway stops have an average of 16 cameras.
A teenager, who police said may have been with the shooter, was taken into custody shortly afterward. He was still being held Thursday evening, Seaborough said.
The 15-year-old doesn't attend school, she said.
Police said that despite initial theories, the violence was not connected to what schools the victims attended.
The subway shooting stemmed from an earlier fight between individuals for reasons that were still not clear, police said.
Contact Robert Moran at 215-854-5983 or bmoran@phillynews.com, or follow @RobertMoran215 on Twitter.
