China's military said on Monday that a U.S. naval destroyer Hopper had entered Chinese territorial waters without the permission of the Chinese government, Reuters reported.

According to a publication on the WeChat app made by the official account of the Southern Command of the People's Liberation Army, the Chinese army has sent its naval and air forces to "track, monitor and send a warning" to the vessel. The statement said the case "confirms that the United States is an absolute contributor to security risk in the South China Sea."

The announcement comes days after China accused the Philippines of sending "foreign forces" to patrol the South China Sea, referring to joint patrols by Manila and Washington that began on Tuesday.

Australian warship in Taiwan Strait irritates China

Earlier this month, the U.S. and China held "frank" talks on naval issues, including disputed territory in the South China Sea, with the United States stressing concerns about "dangerous and illegal" Chinese actions there, the State Department said.

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