Canadian Prime Minister Justin Trudeau said Saturday that on his order a U.S. fighter jet shot down an “unidentified object” that was flying high over the Yukon, acting a day after the U.S. took similar action over Alaska.

North American Aerospace Defense Command, the combined U.S.-Canada organization that provides shared defense of airspace over the two nations, said it had detected an object flying at a high altitude over northern Canada. It wasn’t immediately clear how high up it was flying or what it was.

Trudeau said he also spoke with President Joe Biden, who himself ordered the downing of an unidentified object over remote Alaska on Friday.

A NORAD spokesman, Maj. Olivier Gallant, said both Canadian and U.S. jets operating as part of NORAD had been deployed. The jets were scrambled and it was a U.S. jet that shot it down.

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