Clashes have resumed between rival political factions in the Gaza Strip, killing at least three people and wounding more than 22. Violence broke out two days ago as fighters from the ruling Hamas party tried to break up protests by civil servants against unpaid wages. They exchanged fire with security forces loyal to the Fatah movement of President Mahmoud Abbas. The Al Aqsa Martyrs Brigade has now threatened to kill several Hamas leaders, who it holds responsible for lives lost in the clashes. Sources say President Abbas is considering the possibility of forming an emergency government or calling for early elections to end the crisis.