Canada has closed its airspace near parts of the U.S. border due to air defence operation

Canadian Prime Minister Justin Trudeau says a U.S. fighter jet shot down an object over Canada.

The U.S. believes the flying objects over North American airspace were balloons.

Both Canadian and US aircraft were scrambled to track the object, which Trudeau says had “violated Canadian airspace”.

Washington has been on high alert since its military destroyed a suspected Chinese spy balloon earlier this month.

Senate Majority Leader Chuck Schumer told ABC that Beijing was likely using a “crew of balloons” that had “probably been all over the world”.

He told viewers the U.S. got enormous intelligence information from surveilling the balloon.

However a spokesperson for the US Department of Defense said the latest two objects “did not closely resemble” the original balloon and were much smaller.

Three objects have now been shot down over North America in the past week.

On Friday, the American military shot down an object the size of a small car off Alaska.

It happened just under a week after the U.S. destroyed a Chinese balloon over the Atlantic.