Following the U.S. military shootdown of two unidentified aircrafts in Alaska and Canada over the past two days, The Federal Aviation Administration has now announced they are closing airspace in portions of Montana, which house nuclear silos. “The FAA closed some airspace in Montana to support Department of Defense activities,” the FAA told Fox.

The news comes shortly after an unknown object was shot down by a U.S. military fighter jet over Canada in a joint NORAD operation between Canada and the United States.

This is a developing story.