Dozens injured in Philadelphia train derailment

The Philadelphia Fire Department said it had sounded its fourth alarm, indicating a large-scale operation for passengers of Amtrak Train 188 traveling from Washington and bound for New York.

At least one of the metal train cars was bent in an L-shape.

Dozens of emergency personnel used flashlights to comb the area for survivors after dark. They used ladders to climb over the flipped trains.

Multiple fire engines, ambulances and police cars were deployed on the scene.

The fire department said it had requested helicopters for additional lighting.

Train 188, a Northeast Regional rail service train, was scheduled to leave Washington at 7:10 pm (2310 GMT) and arrive in New York at 10:34 pm.

There are no seat belts on trains operated by Amtrak, the national long-distance rail service.

The National Transportation Safety Board said it was gathering information about the derailment.

Former US Congressman Patrick Murphy of Pennsylvania was on the train.

"I'm ok. Helping others. Pray for those injured," he tweeted.

Murphy, who was on board the cafe car, said the train seemed to be going 60-70 miles (97-113 kilometers) per hour when it suddenly derailed and rolled.

Some of the injured -- many with bloodied hands and faces -- were unable to move, Murphy said.