TOKYO — Vice President Biden on Tuesday said the United States is “deeply concerned” by China’s move last week to establish an air defense zone over a disputed chain of islands in the East China Sea, but he stopped short of demanding that Beijing withdraw its declaration.

Biden blamed China’s action for raising regional tensions with a pair of U.S. allies, Japan and South Korea, which the vice president warned would “increase the risk of accidents and miscalculation.”

“We, the United States, are deeply concerned by the attempt to change the status quo in the East China Sea,” Biden said during a joint appearance with Japanese Prime Minister Shinzo Abe.It was Biden’s first public comment on the dispute in the East China Sea since arriving in Japan on the first stop in a week-long trip to Northeast Asia. The Obama administration hopes the trip will help ease mounting tensions in the region.

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