Israelis blamed as West Bank blast kills six

An explosion ripped through a shack in the West Bank today, killing six Palestinian activists in Yasser Arafat’s Fatah movement in one of the deadliest single episodes in 10 months of Mideast violence.

Later, in the Gaza Strip, Israeli helicopters fired rockets at Palestinian police headquarters in Gaza City, wounding two policemen and sending white smoke rising from the compound as people ran frantically from the buildings into the street.