NEW : Ambassador to the U.N. Samantha Power said the U.S. government was `` deeply disturbed '' by ongoing reports of brutality in the nation . ` Total killed in Bangui is at least 92 , with 170 injured , aid group says . ` ` The operation has begun , '' France 's foreign minister says . U.N. Security Council backs resolution by African and French troops . ` ` It is clear that urgent action is needed to save lives , '' says U.S. envoy to the United Nations .
NEW : Total killed in Bangui is at least 92 , with 170 injured , aid group says . ` ` The operation has begun , '' France 's foreign minister says . U.N. Security Council backs resolution by African and French troops . ` ` It is clear that urgent action is needed to save lives , '' says U.S. envoy to the United Nations .