The U.S. military is tracking a mysterious high-altitude balloon drifting across the western part of the country on Friday, CBS News reported, citing U.S. officials.
Military aircraft spotted and investigated the balloon, but have not yet determined its nature or origin and do not assess it as a threat, the officials told CBS. It was last known transiting eastward on the jetstream on Friday, a source familiar told the outlet, and was spotted in Colorado earlier in the day, one of the officials said.