All-clear given at Alabama military base after report of active shooter

HUNTSVILLE, AL (KUSI) — The all-clear was given at a military installation in Alabama Tuesday after reports of an active shooter on base prompted a two-hour lockdown.

 Redstone Arsenal military installation alerted employees of a possible active shooter on their twitter just before 8:30 a.m. PST Tuesday. The installation was placed on lockdown and employees were told to "run hide fight."

Officials gave the all-clear two hours later. There were no reports of arrests or injuries. 

An investigation was underway to determine what caused the alert, Redstone Arsenal spokesman Christopher Colster said. 

The military installation was scheduled to undergo an training exercise this week, but an email sent to employees said the incident was not related and should be treated as a “real world event,”  according to CNN.

The military arsenal has more than 30,000 civilian and military employees which oversees Army missile defense programs. It also houses NASA’s Marshall Space Flight Center. 

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