The Israeli military on Saturday launched a manhunt in the northern West Bank as it searched for a pair of Palestinian attackers who shot and killed a security guard at the entrance of a Jewish settlement. The fresh attack, combined with the death of a Palestinian man elsewhere in the occupied West Bank, could further fuel tensions that have soared over the past two months. A string of Palestinian attacks in Israel and the West Bank have left 15 Israelis dead, while at least 27 Palestinians have been killed by Israeli security forces in recent weeks. The security guard was...