By Mohammed Salem GAZA (Reuters) - A bomb exploded next to a car used by the armed wing of Hamas in the Gaza Strip on Friday, killing three gunmen and a girl, the ruling Palestinian Islamist group and medical officials said. The attack was the third of its kind in a day, making for one of the biggest flare-ups in internal violence since Hamas routed the forces of Palestinian President Mahmoud Abbas's secular Fatah faction to seize control of Gaza a year ago. Abbas, finding his authority limited to the West Bank, split with Hamas and revived peace efforts with Israel. More recently he has tried to find reconciliation with his Islamist rivals but they have balked at his precondition that they give up Gaza. The Hamas armed wing issued a statement blaming "members of the fugitive party" -- a derogatory term for Fatah -- for...
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