“An American U-2 plane invaded the Northern Zone while maneuvers were being carried out there using military weapons. This had an extremely negative impact on our regular military exercises ... The Chinese side expresses a strong protest on this matter, "the press service of the PRC Defense Ministry quoted him as saying.

Beijing also stressed that such actions violate bilateral agreements on airspace security and can "easily lead to misunderstandings."

“This is an open provocation. We have already made a serious presentation to the United States about this, ”the statement reads.

Earlier, the South China Morning Post newspaper, citing a source in the Chinese Armed Forces, wrote that US reconnaissance aircraft pose risks to civil aviation in the South China Sea.