(CNN)
The Pentagon is tracking a high-altitude surveillance balloon over the continental United States, according to agency spokesman Brigadier General Patrick Ryder.
A senior defense official said it is suspected to be a Chinese surveillance balloon.
The Pentagon has been monitoring the balloon for several days as it moved over the northern United States.
The US military decided not to shoot down the balloon, Ryder said.
“The balloon is currently traveling at an altitude well above commercial air traffic and does not present a military or physical threat to people on the ground,” Ryder said.
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