Federal investigators are probing a fire that broke out on a Philadelphia-area commuter train and prompted the evacuation of hundreds of passengers Thursday.

The National Transportation Safety Board said on X Friday that it would investigate the incident. The fire broke out near the Crum Lynne station on the Southeastern Pennsylvania Transportation Authority’s Wilmington/Newark line in Ridley Park, with about 350 people evacuated.

The fire started under the first car of the six-car train at about 6 p.m., leading to the evacuation. There were no injuries reported, but the crew noticed after the train was cleared that the first car had been engulfed in flames, SEPTA spokesperson Andrew Busch told KYW-TV.

A passenger who was in the train’s second car told WHYY-FM she smelled smoke before the fire intensified.

“It’s not a fast train, but it was moving slower than normal … Somewhere around, I think Norwood or Ridley Park, I started smelling smoke. We just thought we were just stopped to pick up people, but then some of us realized that we weren’t at the station. We were still a few feet away from the station,” said Ashlee Woods, a WHYY intern.

The cause of the fire is unknown.

“We don’t know where this started, just that it was in the area underneath the train and then obviously engulfed the train in flames,” Mr. Busch told WPVI-TV.

The first car was destroyed, and the fire briefly reignited in Prospect Park as it was being towed, according to the Delaware County Daily Times.

• Brad Matthews can be reached at bmatthews@washingtontimes.com.