Arab divisions over the Gaza crisis have re-emerged at a summit in Kuwait.
Egyptian President Hosni Mubarak said Hamas had invited the Israeli attacks on the Gaza Strip by refusing to extend a truce that expired in December while Syrian President Bashar al-Assad said Arab leaders should adopt a resolution declaring Israel a terrorist entity.
Israeli Prime Minister Ehud Olmert has said he wants troops to leave Gaza "as quickly as possible" and some have already left.
Anonymous Israeli officials, quoted by AP news agency, said the withdrawal would be completed before US President-elect Barack Obama's inauguration on Tuesday.
But analysts say big questions remain, such as who will police Gaza's southern border with Egypt and how much power Hamas still has.
Hamas has said it will hold fire for a week to give Israel time to withdraw its forces from the Gaza Strip.
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