Reported active shooter at Alabama's Redstone Arsenal

The Restone Arnesal in Huntsville, Alabama was locked down Tuesday morning because of a reported active shooter situation. The Arsenal posted an update on Twitter just before 11:30 a.m. telling those on the installation to "run, hide, fight."Possible active shooter on the Arsenal. Installation is locked down. Run hide fight.— Redstone Arsenal (@TeamREDSTONE) June 27, 2017
The arsenal houses a number of tenants including the US Army Material Command, the Army's Aviation and Missile Command,