Hamas and Fatah going at it....

GAZA CITY (CNN) -- Rival factions killed more than two dozen people Tuesday in bitter fighting that has left Gaza sliding into chaos, Palestinian officials said.

As Fatah radio called on fighters to confront Hamas militants and broadcasts from Hamas fighters urged their Fatah foes to abandon their posts or face death, Palestinian Authority President Mahmoud Abbas appealed in vain for a cease-fire.

"If anybody thinks that we will be a winner out of this fire, I think they're wrong," said Palestinian official Saeb Erakat. "If this fire continues, it will burn all of us. Nobody stands to gain anything."