Two U.S. warships sailed through the sensitive Taiwan Strait on Thursday, drawing protest from Beijing, the second such mission this month and coming almost two weeks after a Chinese aircraft carrier group used the same waterway.

China, which claims democratically run Taiwan as its own territory, has been angered by stepped-up U.S. support for the island, including arms sales and sailing warships through the Taiwan Strait, further souring Beijing-Washington relations.

The U.S. Navy said the guided missile destroyers USS John S. McCain and USS Curtis Wilbur had "conducted a routine Taiwan Strait transit Dec. 31 in accordance with international law".