(AP) — Authorities locked down an Alabama military post on Tuesday amid reports of possible active shooter, and workers were advised to "run hide fight." Police cars with flashing lights blocked entrances to Redstone, which also has facilities used by federal law enforcement agencies. Images on social media showed an ambulance and what appeared to be civilians standing outside the Sparkman Center, which includes multiple buildings with offices, an auditorium, cafeteria and an interior courtyard.