Nine people have been wounded in clashes between members of Hamas' military wing, the Izz al-Din al-Qassam Brigades, and Palestinian security forces in Gaza's Jabalya refugee camp.

Aljazeera's correspondent in Gaza, Wail al-Dahduh, said members of Fatah's al-Aqsa Martyrs Brigades were among the injured.

The fighting erupted on Tuesday despite efforts by Egyptian mediators to calm the situation, after two teenage bystanders were killed last week in the worst Palestinian internal conflict in years.

Hamas and Palestinian officials traded accusations of blame for the latest clashes, which followed President Mahmoud Abbas' warning to resistance fighters that he would not tolerate any further fighting with his security forces or attacks on Israel.

Palestinian Interior Ministry spokesman Tawfiq Abu Khussa said Hamas fighters had wounded three members of Abbas' Fatah movement in shooting attacks and burned three Fatah vehicles.

Hamas, a resistance movement that has posed a growing political and military challenge to Abbas, accused security force members of being behind the torching of two pro-Hamas offices and a Hamas vehicle.

Also on Tuesday, rocket and mortar shells were fired at two Jewish settlements in the southern Gaza Strip.

The Izz al-Din al-Qassam Brigades issued two statements claiming responsibility for the attacks, Aljazeera's correspondent said.

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