6:55 p.m. Update: US Airways 3389 had an unspecified warning, according to a spokesman for MWAA. The plane had an uneventful landing and passengers disembarked safely.

According to flightstats.com, the flight originated in Burlington, Vt. at 4:57 p.m. and landed at Reagan National at 6:44 p.m., 11 minutes later than scheduled.

6:50 p.m. Update: Authorities report that fireboats were not used and that D.C. units are clear of the Potomac River near the airport.

Original post: D.C. Fire /EMS officials are reporting an aircraft in distress at Reagan National Airport with fireboats standing by.

Additional details were not immediately available.

Transportation writer Ashley Halsey III is checking with the Metropolitan Washington Airports Authority.

We’ll have more shortly.