Israeli forces shot dead two Palestinians in separate incidents Wednesday, including one who allegedly tried to stab soldiers and a teenager who appeared to point a fake gun at police, sources on both sides said.In the first incident, Arref Abdel Nasser Arref Lahlouh, 22, was killed "by Israeli gunfire," near the occupied West Bank Palestinian city of Qalqilya, according to the Palestinian health ministry.The army said that Lahlou "attempted to carry out a stabbing attack" near the Jewish settlement of Kdumim.