Pentagon documents show up to four additional Chinese spy balloons: Report

There are up to four additional Chinese spy balloons that have been noted by U.S. intelligence in a recent trove of leaked classified Pentagon documents, according to a report on Friday.

A spy balloon that attracted national attention when it traversed U.S. airspace earlier this year was one of at least three other balloons documented by the United States. Another balloon flew over a U.S. carrier strike group in an unreported incident. The third crashed in the South China Sea, a top-secret document obtained by the Washington Post stated. It is not clear when the other events occurred.

The Chinese spy balloon spotted in U.S. airspace was referred to as Killeen-23 by U.S. intelligence agencies. The balloon carried an array of sensors and antennas that the U.S. government still had not identified more than a week after it went down, according to the document allegedly leaked by Massachusetts Air National Guardsman Jack Teixeira.