As UN mediator for Palestine, Bernadotte had submitted proposals to resolve Arab-Israeli differences based on a union between two states, Palestine and Transjordan. He also had called for the return of Palestinian refugees. Leaders of Israel and Jordan had rejected his ideas. On September 17, Bernadotte is assassinated, allegedly by Jewish terrorists. He is succeeded as UN mediator by Ralph Bunche, who negotiates Israel’s armistice agreements with four Arab states.