Authorities outside Baltimore say a CSX train hauling coal has derailed in downtown Ellicott City and two people have been killed.

Howard County officials say 21 of the train's 80 cars flipped over and fell from a bridge just before midnight Monday. County Executive Ken Ulman says some of the cars crushed parked vehicles in a nearby county-owned lot.

The two people who were killed were on the tracks at the time of the incident, and were not railroad employees. The identities of the victims have not been released.

It's unclear what caused the crash.

Ulman says crews were working to clean up the coal that spilled from the train. Streets in the area remained closed early Tuesday.