A Palestinian youth takes a picture of masked Fatah militants during a rally against the killing of three sons of a Palestinian intelligence official, in the West Bank city of Ramallah December 13, 2006. Tensions and violence have spiralled in Gaza and the occupied West Bank between Hamas and the rival Fatah faction of moderate President Mahmoud Abbas after attempts to form a national unity government failed. Unrest has increased since the killing of the three boys. REUTERS/Oleg Popov (WEST BANK)