UNITED NATIONS (AP) — Russia and the United States exchanged threats Wednesday at a tense U.N. Security Council meeting over the Ukraine crisis, with Moscow’s envoy warning that the U.S. ambassador’s “insults” are jeopardizing Moscow’s willingness to cooperate with Washington on other diplomatic matters.

It was the council’s eighth meeting in less than three weeks on Ukraine, a show of determination by Western powers to highlight Russia’s diplomatic isolation over the Crimean Peninsula — even if the council is powerless to act because of Moscow’s veto power as a permanent council member.