By Ali Sawafta JENIN, West Bank (Reuters) -Israeli forces killed two Palestinian teens on Saturday in clashes in the occupied West Bank, Palestinian officials said, and a Palestinian gunman wounded four people in a shooting attack in Jerusalem, Israeli police said. Police said the shooter had opened fire at Israeli security forces at a checkpoint at the entrance to Palestinian refugee camp Shuafat on Jerusalem’s outskirts near the West Bank, badly wounding a woman and a security guard. Two border-police officers sustained mild injuries, and forces were hunting for the Palestinian suspect, poli…