The United States clashed with China and Russia during a disarmament debate Tuesday over how to prevent an arms race in outer space, and Washington criticized Beijing for its recent test of an anti-satellite missile.

Russia and China, in turn, condemned the “one state” that refuses to consider a treaty banning space weapons–a reference to the U.S.

The meeting of the 65-nation Conference on Disarmament came a month after China launched a warhead from a ballistic missile to destroy one of its old weather satellites–a test that was criticized as a provocative display of the Asian country’s growing military capability.