WASHINGTON — MARC’s Penn Line was suspended for nearly three hours on Wednesday afternoon after an Amtrak train struck and killed someone on the tracks in Seabrook, Maryland.

The Maryland Transit Administration said at about 5:15 p.m. that service had resumed. Delays would run between 60 and 90 minutes, and persist for several hours.

At 7 p.m., the MTA announced that a second track had been opened between New Carrollton and Bowie, which should lessen the delays.

MTA said earlier that the crowding at Union Station meant that all trains would make all stops between Washington and Baltimore.

Amtrak announced that at about 2:30 p.m., a train going from New York to Miami hit someone on the tracks near Annapolis Road and Lanham-Severn Road.

Mark Brady, a spokesman for the Prince George’s County Fire Department, said via Twitter that the person who had been struck died.

Amtrak traffic is also temporarily being held.

MARC opened the Metro option, meaning that passengers who show MARC tickets to the Metro station manager can go through the gate.

No one on the Amtrak train was injured.