The United States, European Union nations and others on the 47-member body are urging the government of Yemen to stop using force against peaceful protesters and seek a resolution to the months-long unrest.

Yemeni government forces opened fire Sunday with anti-aircraft guns and automatic weapons on protesters in the capital Saana, killing at least 26 people.

Washington’s envoy to the Human Rights Council, Eileen Chamberlain Donahoe, said Monday the US was concerned at “increasingly disturbing reports about violence” and urged the government to prosecute those responsible for abuses against civilians.