FAA declares 'National Defense Airspace' over Lake Michigan

( Fox )

The Federal Aviation Administration has declared a "national defense airspace" over part of Lake Michigan, the organization announced Sunday.

The FAA has not clarified why it has banned civilian air traffic from the area. The FAA last established a national defense airspace over Montana this weekend in reaction to an unidentified flying object.

"Pilots who do not adhere to the following [procedure] may be intercepted, detained and interview by law enforcement or security personnel," the FAA wrote in a Sunday announcement, adding that such pilots may face deadly force in the air.

The FAA did not immediately respond to a request for comment from Fox News Digital.

The FAA ended its traffic ban over Montana later Saturday, with NORAD releasing a statement indicating that the object was only a radar anomaly.

Nevertheless, Rep. Matt Rosendale, R-Mont., released a statement on Twitter saying that NORTHCOM believes there is an object above the state that is not an anomaly.

"I am in constant communication with NORCOM [sic] and they have just advised me that they have confidence there IS an object and it WAS NOT an anomaly. I am waiting now to receive visual confirmation. Our nation’s security is my priority," he wrote Sunday.

NORAD had issued a statement Saturday saying that it "detected a radar anomaly and sent fighter aircraft to investigate."

"Those aircraft did not identify any object to correlate to the radar hits. NORAD will continue to monitor the situation," the statement continued.

The U.S. has shot down three aircraft over North America in the past week, with the first being a Chinese spy balloon off the coast of South Carolina. The second and third are believed to have been smaller balloons, shot down over Alaska and Canada respectively.