Huntsville, Alabama- Redstone Arsenal has reportedly been put on lockdown after reports of a possible active shooter in or near building 5301.

The Marshall Space Flight Center sent an alert at 10:00a.m. Tuesday warning that a “situation exists near the Sparkman Center, RSA bldg. 5301.”

The message asked for people to avoid the area.

A second message send at 10:30 reads: “An active shooter has been reported at the RSA Sparkman Center. Personnel in this area take protective action now. This is not a drill.”

An active shooter drill was planned for tomorrow, however, officials tell us the current situation is not part of the drill.” – WAFF

More to follow as this story is still developing. 

Possible active shooter not currently in ACC HQ, but on Redstone Arsenal. Installation on lock down. Run, hide, fight. https://t.co/BKbh9CIeI5

— Army Contracting (@ArmyContracting) June 27, 2017

There is a active shooter in bldg. 5301 on Redstone Arsenal on the second floor happening now.!!! The Senator Sparkman Center building. Ala.

— Mark Anthony (@AlleyGatorGunge) June 27, 2017

Redstone Arsenal is on lockdown. Active shooter reported on the army side at the Sparkman Center. ISS Payload Operations Center ok.

— Mason Hall (@space_mace) June 27, 2017

Read Next: Joint Base Andrews on lockdown: Possible active shooter

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Update: 1:42 pm EST- All gates are reportedly now open.

#BREAKING Gate 7 at #RedstoneArsenal has been reopened, after reports of a possible active shooter on the Arsenal. pic.twitter.com/hxGGazZLIE

— Rebecca Petit (@RebeccaWZDX) June 27, 2017

Still an active scene w/ police, #FBI at #RedstoneArsenal Sparkman Center, still no word on what exactly happened pic.twitter.com/uYlguXdESK

— Shevaun Bryan (@finessebryan) June 27, 2017

Featured image courtesy of Twitter.