Besides the rockets fired by the Qassam Brigades of Hamas, other factions claimed responsibility for rockets fired into Israel and attacks on Israeli soldiers, including Al-Aqsa Martyrs' Brigades (affiliated with Fatah), the Abu Ali Mustapha Brigades (armed wing of the Popular Front for the Liberation of Palestine), the Quds Brigades and the Popular Resistance Councils.[19] A Fatah official stated that the rocket attacks by his faction contradicted the official position of Mahmoud Abbas, Fatah leader and President of the Palestinian National Authority. Abbas had called on all sides to cease hostilities unconditionally.