Two men were struck and kiilled by SEPTA trains in separate incidents today, an unusually deadly day in the transit system.

The transit system also experienced delays after an unattended bag was found at the Warminster station.

The most recent incident happened at about 1 p.m., when an outbound Regional Rail train on the West Trenton Line hit a man who was on the tracks between the Neshaminy Falls and Langhorne stations, SEPTA spokesman Andrew Busch said.

As of 1:30 p.m., service on that line was suspended between Neshaminy Falls and West Trenton.

Authorities were trying to determine why the man was on the tracks.

In a separate incident earlier today, a man died after he was struck by a SEPTA train on the Broad Street line.

The man was hit by a northbound train at the Allegheny Station at about 9 a.m., Busch said.

When emergency crews arrived at the scene, the 38-year-old man was alive but in critical condition. He was taken to Temple University Hospital, where he died.

It wasn't immediately known why the man was on the train tracks or whether his death was intentional.

"That's still part of the investigation," Busch said.

Philadelphia police and SEPTA are looking into the incident.

No other information about either man's identity was available.

SEPTA ran shuttle buses between the Girard and Erie stations for about two hours while authorities cleared the scene. The transit agency said normal service resumed around 11 a.m., though some delays continued.

In a third incident today, a train on the Warminster Line was stopped so authorities could examine an unattended bag at the Warminster station, leading to delays on that line for more than an hour.

That incident was cleared and the line resumed normal operations shortly after 2:15 p.m.