A British aid worker was killed Friday in a U.N. compound in the West Bank during a gunbattle between Israeli troops and Palestinian gunmen — the first senior U.N. official to die in over two years of fighting. The United Nations accused Israeli soldiers of preventing an ambulance from immediately reaching Iain Hook, a senior manager for UNRWA, the U.N. agency that helps Palestinian refugees. The Israeli army said he was evacuated from the U.N. compound in the Jenin refugee camp as soon as possible. The death occurred hours after Israel reoccupied the West Bank town of Bethlehem for the...