Military post in southeast U.S. on lockdown over "possible active shooter"

WASHINGTON, June 27 (Xinhua) -- The U.S. Army's Redstone Arsenal post in southeastern U.S. state of Alabama is on lockdown Tuesday morning amid reports of a "possible active shooter," the facility tweeted.

The shooter was reportedly at Building 5301, the aviation and missile command building, at the post's Sparkman Center, Army spokeswoman Kim Hanson said.

An ambulance service has been sent to the facility while the FBI said its agents were headed to the scene, according to media reports.

"If you are not in the Sparkman Center, stay away from the area," said an army email sent to facility personnel and relatives and obtained by CNN.