GAZA CITY, Gaza Strip - Hamas gunmen riddled a Fatah police jeep with gunfire at close range Tuesday, killing eight policemen in the most ruthless round yet of factional fighting, pushing the Palestinian unity government closer to collapse. Gunmen in black ski masks took up positions in the streets and terrified residents huddled in their homes. Israel, too, was briefly drawn into the battle. "I don't know when it's going to end and what the future will bring," said Salman Abu Arafeh, 42, a Gaza City interior decorator who was pinned down by gunfire in his apartment for hours, along...