The United States is reviewing its participation in the UN Human Rights Council, U.S. Ambassador Nikki Haley has told a meeting of the council in Geneva.
Speaking on the first day of a three-week session of the council on June 6, Haley called for reforms to eliminate what she called its "chronic anti-Israel bias."
"The United States is looking carefully at this council and our participation in it. We see some areas for significant strengthening," she said.
Haley also said that countries that violate human rights should not be members of the council.
In a speech opening the session, the UN high commissioner for human rights called for an end to Israel's occupation of Palestinian territory, saying the move would be essential for peace.
Zeid Ra'ad al-Hussein said the Palestinian people were marking "a half-century of deep suffering under an occupation imposed by military force."
He added that Israelis also deserve freedom from violence, saying, "Maintain the occupation and for both peoples there will only be a prolongation of immense pain."
Hussein decried more than 2,000 years of Jewish suffering culminating in the "colossal crime" of the Holocaust.