Palestinian assailants shot and killed a security guard at the entrance of a Jewish settlement in the occupied West Bank late Friday, the Israeli military said, in a fresh attack that could further fuel Israeli-Palestinian tensions that have soared in the past two months. The Israeli military said early Saturday that the attackers arrived at the Ariel settlement entrance and shot the guard at his post before fleeing the scene. The military launched a pursuit in the West Bank. A string of Palestinian attacks in Israel and the West Bank over the past two months have left 14 Israelis dead....