(Reuters) – Muslim allies of Saudi Arabia piled pressure on U.N. chief Ban Ki-moon over the blacklisting of a Saudi-led coalition for killing children in Yemen, with Riyadh threatening to cut Palestinian aid and funds to other U.N. programs, diplomatic sources said on Tuesday. The United Nations announced on Monday it had removed the coalition from a child rights blacklist – released last week – pending a joint review by the world body and the coalition of cases of child deaths and injuries during the war in Yemen.