China has accused the United States of "endangering" peace and stability in the Taiwan Strait after a U.S. military plane flew through the sensitive waterway on Monday, with the U.S. Navy responding that it had been in international airspace.

Beijing has been incensed by U.S. military missions through the narrow strait, most frequently of warships but occasionally of aircraft, saying China "has sovereignty, sovereign rights and jurisdiction" over the waterway. Taiwan and the United States dispute that saying it is an international waterway.

The Eastern Theatre Command of China's People's Liberation Army said its forces closely monitored the P-8A Poseidon maritime patrol and reconnaissance plane, which is also used for anti-submarine missions, as it flew through the strait which separates China from Taiwan.

"The U.S. side's actions deliberately interfered with and disrupted the regional situation and endangered peace and stability in the Taiwan Strait. We firmly oppose this," it said in a short statement.

"Theatre forces remain on high alert at all times and resolutely defend national sovereignty and territorial integrity."

The U.S. Navy's 7th Fleet said the aircraft had flown in international airspace and that the United States will continue to fly, sail, and operate anywhere international law allows including within the Taiwan Strait.

"By operating within the Taiwan Strait in accordance with international law, the United States upholds the navigational rights and freedoms of all nations. The aircraft's transit of the Taiwan Strait demonstrates the United States' commitment to a free and open Indo-Pacific," it added in a statement.