This was reported to CNN by US military forces.

In particular, Washington said that for the American WC-135 Constant Phoenix, it was a planned flight for scientific purposes and at the time of interception it was in the international airspace.

It should be noted that earlier this aircraft had already been used to collect data on nuclear weapons tests in North Korea.

Recall that China is very wary of any activity of the US military near its territorial waters.

As previously reported by URA-Inform, China is alarmed by the likely support of Taiwan by the US President-elect, Donald Trump, and think through "tough measures" designed to stop the island's desire for independence.