Amtrak confirms that there were delays on its tracks between Baltimore and Washington this morning because of signal problems but says the cause has not yet been determined.

The Inside Charm City blog had reported that sabotage might have been the cause.

Amtrak spokeswoman Barbara Petito did not rule out sabotage as the reason a  wire came down in the Seabrook-New Carrollton area at 8:42 a.m. Neither did she confirm the report. She said Amtrak Police were still investigating why the wire came down and set off a signal warning that the track ahead was occupied.

Petito said two Amtrak trains were delayed -- one by five minutes, another by 13. She said she had no information about MARC delays. She noted that that of copper wire has been a problem for Amtrak of late.