Mystery surrounds what exactly was object US jet shot down over Alaska

High-altitude object the size of a small car was downed on Friday but its owner and purpose have yet to be identified

Questions remain after the US government shot down two high-altitude objects, one near Deadhorse, Alaska along the north-eastern Alaskan coast and a second near Yukon, Canada, that have yet to be identified.

Canadian prime minister Justin Trudeau tweeted on Saturday afternoon that he had ordered the takedown of an unidentified object in Canadian airspace.