More than 40 people were injured when a commuter train crashed into another one that was parked at a station in suburban Philadelphia early Tuesday, transit officials said.

The Southeastern Pennsylvania Transportation Authority said the crash happened around 12:15 a.m. Tuesday.

An inbound Norristown High Speed Line train crashed into an unoccupied, parked train at the 69th Street Terminal in Upper Darby, said SEPTA spokeswoman Heather Redfern.

SEPTA initially said 33 people aboard the train were injured, but later put the number at 42. None was considered life-threatening.

In an early morning news briefing, Upper Darby Mayor Nicholas Micozzie said four of the inured, including the train’s conductor, were rushed to  hospitals.

“The conductor is in the hospital right now, I can’t release his condition,” Micozzie said.

He was subsequently released.

The cause of the crash remained under investigation.

SEPTA said there likely would be service disruptions for the Tuesday morning commute.

In February, four people were injured in a crash near the 69^th Street Terminal involving three out-of-service commuter trains. At the time, SEPTA said one train rear-ended another on a loop where trains turn around to get back into service. Cars from that accident derailed and hit a third train on nearby tracks.