8:23 A.M. Update:
MARC train 894 has been canceled. The next available train is still train 880, which is on time and approaching Germantown right now. Again, Metro will accept MARC tickets.
MARC train 894 is stopped just east of the Frederick station with mechanical problems. It’s currently 50 minutes late and counting. The next available train is train 880, which is running on time, according to the Maryland Transit Administration.
Metro will honor MARC tickets this morning.