A bomb blast damaged the Gaza home of a body guard of Fatah kingpin Mohammed Dahlan on Sunday, as gunmen from rival Palestinian factions exchanged fire at the start of a third day of infighting that has killed 21 people. Dahlan is tipped as a possible successor to Abbas. The sounds of exploding grenades and automatic weapons fire echoed across Gaza City as gunbattles raged through the night, witnesses said. But there were no casualties reported in either the bomb blast or the fighting. Full Story