PHILADELPHIA >> Authorities say a burned body was found on top of a SEPTA regional train at a station in Philadelphia.

SEPTA officials would only say a “medical emergency” had occurred at the Jefferson Station in Center City on Thursday. But a police official confirmed that a body was found.

The investigation was causing train delays of up to 20 minutes.

It wasn’t immediately clear how the victim got on top of the train or how long the body had been there. Further details opn the incident were not immediately available.