China and Russia will hold "routine" naval exercises in the South China Sea in September, China's Defence Ministry said on Thursday, adding that the drills were aimed at strengthening their cooperation and were not aimed at any other country.
The exercises come at a time of heightened tension in the contested waters after an arbitration court in The Hague ruled this month that China did not have historic rights to the South China Sea and criticized its environmental destruction there.
China rejected the ruling and refused to participate in the case.
"This is a routine exercise between the two armed forces, aimed at strengthening the developing China-Russia strategic cooperative partnership," China's defense ministry spokesman Yang Yujun told a regular monthly news conference.
"The exercise is not directed against third parties."
China and Russia are veto-wielding members of the U.N. Security Council, and have held similar views on many major issues such as the crisis in Syria, putting them at odds with the United States and Western Europe.
Last year, they held joint military drills in the Sea of Japan and the Mediterranean.
White House spokesman Josh Earnest played down the significance of the exercises even though he conceded that the South China Sea was "a sensitive diplomatic topic right now".