MARC's Camden Line service has been temporarily suspended after a man was struck and killed south of the Muirkirk station around 6:30 a.m., transit officials and Prince George's County police said.
The man struck by the train was not further identified. Transit officials said he was trespassing. Passengers are asked to use Penn Line trains that are running on time or Metro from Greenbelt.
A crash that closed one lane of the inner loop of the Baltimore Beltway at Exit 13 for MD 144/Frederick Road has been cleared, state transportation officials said.