NEW : Police confirm they are focusing on whether the attack was `` nationalistic '' NEW : American Kristine Luken died in the attack . The term is used when victims are targeted based on their Israeli or Arab background . Luken was hiking with a friend and colleague from a Arab ministry . Kristine Luken 's friend survived the attack and summoned help .
NEW : Police confirm they are focusing on whether the attack was `` nationalistic '' NEW : The term is used when victims are targeted based on their Israeli or Arab background . Luken was hiking with a friend and colleague from a Arab ministry . Kristine Luken 's friend survived the attack and summoned help .