A joint counter-terror operation by the Israeli police special unit, Shin Bet and IDF encountered armed Palestinian resistance at the West Bank Jenin refugee camp early Saturday. A 22-year old Hamas operative opened fire when the Israel force tried to arrest him. He was killed when they shot back. There was more shooting when a group of armed Palestinians opened fire on the Israeli troops. Two more Palestinians were killed, one a member of the pro-Iranian Jihad Islami, and 10 injured. Three of Israeli police officers were slightly hurt and 3 Palestinians detained as suspected terrorists. The Israeli population just outside the Gaza Strip was placed on alert against rocket reprisal for the deaths of Hamas and Jihad Islami members in Jenin. Jihad-Gaza last week threatened retaliation for every Palestinian death on the West Bank.