Metro and MARC train services between the College Park and Greenbelt stations shut down Wednesday after a pedestrian bridge collapsed onto the tracks, authorities said.

The bridge, which spans from the 5100 to the 5400 block of Berwyn Road, collapsed at about 2:30 p.m. after an unretracted construction crane near the tracks accidentally struck the bridge, said Mark Brady, chief spokesman for the Prince George’s County Fire Department.

No injuries have been reported.

Buses replaced the service between College Park and Greenbelt, in addition to more Yellow Line trains running during rush hour, Metro representatives said.

“All Yellow Line services are going to run to and from College Park to supplement Green Line service,” Metro spokeswoman Morgan Dye said after the collapse.

Dye said the Green Line running from Branch Avenue to College Park was operating regularly.

Metro workers crowded around the scene as the concrete floor of the overpass lay on a container that construction crews had set up. Above the Metro tracks, the bridge’s metal fencing hung crookedly.

Risse Brothers School Uniforms employee Ali Jalloh was near the bridge at about 2:30 p.m. He said he heard a “very loud banging noise,” looked outside and saw a crane hit the bridge and sparks go off.

The existing construction work halted as Metro officials and firefighters arrived at the scene. The accident forced an arriving Green Line train to sit in front of the debris for about five minutes before going backward, Jalloh said.

Unique Cleaning Solutions General Manager Angel Rivera works in a building next to the tracks.

“There is always high traffic on the bridge because it connects to Lake Artemesia,” he said. “I was on it, like, yesterday.”

As of Wednesday evening, there was no estimate as to when the section of the Metro track would reopen.