The U.S. and Western allies clashed with Russia and China on Thursday over Iran’s nuclear intentions, as Washington sought, at the United Nations, to further justify the war it launched against Iran two weeks ago.

At a meeting of the 15-member U.N. Security Council, which is chaired this month by the U.S., Russia and China moved unsuccessfully to block a discussion about a committee established to oversee and enforce U.N. sanctions on Iran. They were overruled 11-2 with two abstentions.

Addressing the council, U.S. envoy to the United Nations Mike Waltz accused Moscow and Beijing of seeking to protect Tehran by blocking the work of the so-called 1737 Committee.