Montana Air Force Base on lockdown due to ‘active shooter alert’

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The Malmstrom Air Force Base went on lockdown Thursday morning in response to an "active shooter alert" on base. 

The base, which is located Cascade County, Montana, went into lockdown status just before 10:30 a.m. local time due to a suspected "real world threat" at building 219. 

Airmen from the Malmstrom Airman Leadership School perform drill evaluations at Malmstrom Air Force Base, Montana, U.S., March 14, 2017.  (Magen M. Reeves/U.S. Air Force/Handout via REUTERS )

FPCON Delta was implemented around 10:36 a.m. while Air Force and emergency personnel were securing the area. 

"The safety of our personnel is of the utmost priority and updates will continue to come from official channels," the base said in a Facebook post. "At this time, it is advised to shelter in place." 

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The Great Falls Police Department and the Cascade County Sheriff’s Office were responding to the scene to provide assistance. Schools in the surrounding area were told to shelter in place. 

Malmstrom officials were directing visitors and spectators to stay away from the building. 

"Public cooperation will help protect against possible injuries and enable base agencies to more effectively deal with the situation," the base said in a statement. 

Montana Governor Greg Gianforte said his office has been in contact with General Hronek.

"I will continue to monitor the situation with the general," the governor said. 

Rep. Matt Rosendale, R-Mont., said his office was "closely monitoring the active shooter development." 

"Praying for the safety of those on base and the law enforcement quickly responding to this situation," he wrote on X, formerly known as Twitter. 

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Sen. Jon Tester, D-Mont., said he had spoken with base leadership and "will continue to track this developing situation closely." 

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Fox News Digital has reached out to Malmstrom Air Force for more information and will update this story accordingly. 

This is a developing story. Check back for updates.