"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 an initial Sunday announcement, adding that such pilots may face deadly force in the air.
"The FAA briefly closed some airspace over Lake Michigan to support Department of Defense activities. The airspace has been reopened," the FAA wrote in a statement to Fox News Digital.
PENTAGON SAYS US DETECTED THIRD FLYING 'OBJECT' OVER ALASKA A DAY BEFORE SHOOTING DOWN OVER CANADA
The FAA has established a national defense zone over part of Lake Michigan. (US NORCOM)
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 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.
REPUBLICANS REACT TO THIRD 'OBJECT' SHOT DOWN OVER CANADA: 'UNPRECEDENTED CHALLENGE'
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.
Rep. Matt Rosendale says NORTHCOM believes there is still an object in the air above Montana. (Reuters)
U.S. forces haul debris from China's surveillance balloon onto a boat off the coast of South Carolina. (US Fleet Forces)
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.