Officials say Dover Air Force Base was on lockdown for several hours after a suspicious person was reported on the Delaware post. [UPDATE: The lockdown was lifted at 2:40 pm.]

Military officials say in a news release that the lockdown was ordered Thursday as a precautionary measure after a suspicious individual was reported around 11 a.m.

Dover Air Force Base is familiar to many Americans as the arrival point for military personnel killed in action, as seen in this file photo. (AP Photo/Alex Brandon)

All personnel were told to shelter in place.

The base, home to fleets of cargo planes, operates one of the largest and busiest air freight terminals in the U.S. military. It is also home to the nation's largest military mortuary and is the arrival point for the remains of troops who have died overseas.