Amtrak and SEPTA was delayed or suspended south of Philadelphia as investigators this afternoon probed the death of a trespasser struck on the tracks.

An unidentified person was struck by an Amtrak Acela Express about 12:20 p.m. in Sharon Hill, Delaware County, said an Amtrak spokeswoman.

Amtrak service was delayed about 30 minutes along the Northeast Corridor between Philadelphia and Wilmington as trains were routed onto a single set of tracks. SEPTA service on the Wilmington-Newark Line was temporarily suspended.

The Acela was carrying 162 passengers and crew as it left Philadelphia at 12:10 p.m. bound for Washington. No injuries were reported aboard the train, the spokeswoman said.

Another trespasser was killed by an Acela Nov. 3 just south of Wilmington.

This week, two people died in Hatboro after being struck by trains on SEPTA's Warminster Line. A teenage boy was killed Monday, a 22-year-old man was killed Wednesday.