As the fear of UFOs grips the United States, the Federal Aviation Administration ordered the airspace over parts of Lake Michigan to be closed temporarily on Sunday. The latest development came after a cluster of 20-30 balloons was seen flying over the area in the skies.

Photos and videos of the balloon cluster were posted by a Twitter user named Patrick J Forkin, who wrote in the caption: “Spotted over Lake Michigan in Chicago. A cluster of 20-30 balloons floating around. #faa #lakemichigan #chicago #ufo #baloon.”

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The order for shutting down the skies above the waters encompassing the water between Green Bay and Traverse City was given by the FAA on Sunday, saying that it was to be used for national defense purposes.The government did not specify why they closed that airspace and only cited NORAD operations. The restriction shave now been lifted and the FAA has stated that everything can go back to normal again.

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Havre airspace in Montana was shut down for nearly an hour after a mystery object was seen flying in the skies above the area 30 miles south of the Canadian border, on Saturday night.

Just hours before on Saturday, Canadian Prime Minister Justin Trudeau, revealed that “an unidentified object” that violated Canadian airspace had been shot down by U.S. F-22s in Yukon by US and Canadian forces. It was a joint order given by Trudeau and President Joe Biden, the White House revealed later.

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Soon after the incident, US and Canadian aircraft were quickly scrambled on Saturday night to Havre. According to The North American Aerospace Defense Command, fighter jets were unable to find the mystery object above Havre. The Command Center also reported that they “did not identify any object to correlate to the radar hits.”

They will continue to monitor the situation following three incidents that already occurred in the past week. Two Chinese spy balloons have been shot down over the US and a third object over Canada.