LINTHINCUM, Md. (WUSA) -- Baltimore Washington International Airport evacuated piers A and B, because of an "unusual odor," officials said on the BWI Airport Twitter feed on Monday morning.
"Unusual odor at B Pier. As precaution, BWI Fire & Rescue investigating. Portions of B &A piers are being cleared as a precaution," the Twitter feed said. The odor was reported around 8:45 a.m.
Pier A opened shortly after, when it was deemed to be safe for people to be screened by security. Checkpoint B reopened later for passenger screening. All checkpoints are now open.
Southwest and Air Tran held some flights, however, there is limited impact on other flights, officials said. "Airport, airline and TSA employees working to get passengers to flights," according to the BWI Twitter feed.
The BWI Fire Department is investigating the nature and origin of the odor.