The U.S. military is tracking a high-altitude balloon over the Western United States, two U.S. officials confirmed to Fox News on Friday.&nbsp;

It was spotted by U.S. military aircraft and determined to not be a threat.&nbsp;

The origin of this balloon and its purpose are not yet known, the two officials said.

The balloon is drifting east in the jet stream.&nbsp;

The U.S. military is tracking a high-altitude balloon over the Western United States, two U.S. officials confirmed to Fox News Friday.{ai:summary}<p>High-altitude balloon over Western US tracked by military, not deemed threat. Origin and purpose unknown. Suspected to be drifting east. #military</p>

Military tracking high-altitude balloon over western US

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