Dover Air Force Base in Delaware was placed on lockdown Thursday after a suspicious person was reported on post.

Personnel were told to shelter in place shortly after 11 a.m. as a precautionary measure, but there have been no reports of an active shooter. The base’s housing area has not been placed on lockdown.

“The safety of our people is our top priority,” Col. Randy Huiss, 436th Airlift Wing vice wing commander, told the Air Force Times. "We take this report very seriously and are taking the necessary precautions to investigate this matter."

Dover AFB serves as one of the largest air freight terminals in the U.S. military and is the arrival point for the remains of troops who have died overseas.

*This article will be updated as more information becomes available.