Sen. Jon Tester, D-Mont., gave an update after the airspace above his home state of Montana was closed and an unidentified object was shot down over Canada

NORAD issued a statement Saturday saying that it "detected a radar anomaly and sent fighter aircraft to investigate." The statement said that "aircraft did not identify any object to correlate to the radar hits," but according to Tester, that does not mean all is clear.

"There may still be something up there," Tester told CBS's "Face the Nation" on Sunday. "It may be a false alarm."