ABERDEEN PROVING GROUND, Md. — A man has barricaded himself inside a home on a U.S. Army installation in Maryland for more than 10 hours.

News outlets cite a release from Aberdeen Proving Ground that says the post’s emergency dispatch received a call from a concerned relative around 8 a.m. Thursday regarding an individual who locked himself inside the home. APG spokesman David Patterson says the man was alone in the home.

As a precautionary measure, area residents have been provided an alternate location to go to until the situation is resolved. Authorities said in an update around 5:30 p.m. that the man remained inside the home.

APG is a research and development, testing and evaluation facility for weapons and equipment. The relationship between APG and the man hasn’t been reported.