Service on the MARC Camden and Brunswick lines has been restored, but remain suspended on the busy Penn Line, after a low-speed collision this morning led to a derailment in Union Station in Washington.

Maryland Transit Administration spokesman David Clark said a train pulling private cars collided with a MARC train that had no passengers aboard a little before 9:20 a.m. Some cars derailed and some  crew members suffered minor injuries, he said. Clark said  the collision occurred after the majority of MARC's morning commuters had already arrived in Washington.

 Clark said Amtrak briefly suspended service on all lines but quickly reopened the station to Brunswick and Camden line trains, which are operated by CSX.

The TBD blog quoted an Amtrak spokesman as saying five of its employees were taken to local hospitals.