A MARC train heading to Baltimore prepares to leave Union Station. (File photo by Sarah L. Voisin – The Washington Post)

A disabled train created major delays on MARC’s Penn Line on Tuesday morning, leading to headaches for southbound travelers.

Train 505, which leaves Perryville at 4:40 a.m., had a problem with its locomotive and was stranded at the Halethorpe station at around 5:50 a.m. It took about 30 minutes for technicians to get the train moving again, according to the Maryland Transit Administration. But the train lost power again between Odenton and Bowie and had to be pushed the rest of the way to D.C.

This train is the third southbound Penn Line train to pass through Baltimore’s Penn Station and Washington’s Union Station each morning, and its mechanical issues created delays on multiple southbound trains heading toward D.C.

Amtrak and MARC are investigating the locomotive failure, the Maryland Transit Administration reports. Amtrak owns the Penn Line tracks and is contracted by the MTA to operate trains on this line.