The U.S. Air Force general overseeing North American airspace said on Sunday after a series of shoot-downs of unidentified objects that he would not rule out aliens or any other explanation yet, deferring to U.S. intelligence experts.

Asked whether he had ruled out an extraterrestrial origin for three airborne objects shot down by U.S. warplanes in as many days, General Glen VanHerck said: “I’ll let the intel community and the counterintelligence community figure that out. I haven’t ruled out anything.”

“At this point we continue to assess every threat or potential threat, unknown, that approaches North America with an attempt to identify it,” said VanHerck, head of U.S. North American Aerospace Defense Command and Northern Command.

VanHerck’s comments came during a Pentagon briefing on Sunday after a U.S. F-16 fighter jet shot down an octagonal-shaped object over Lake Huron on the U.S.-Canada border.

See Also:

The Spectator: Where is the moral outrage about Britain’s grooming gangs?

The incidents over the past three days follow the Feb. 4 downing of a Chinese balloon that put North American air defenses on high alert. U.S. officials said that balloon was being used for surveillance.Another U.S. defense official, speaking on condition of anonymity, said the military had seen no evidence suggesting any of the objects in question were of extraterrestrial origin.

Read more: Reuters