By CBS3 Staff

PHILADELPHIA (CBS) — Philadelphia police are searching for a man they say stabbed a 17-year-old boy on a platform along SEPTA’s Broad Street Line. It happened around 7 p.m. at the Fairmount Station.

SEPTA says two teenagers were fighting an adult male on a northbound train.

They say the stabbing happened after the group exited the train.

The teenager is in critical but stable condition.