A Palestinian worker works at a cows ranch in Rafah refugee camp, southern Gaza Strip on June 7, 2011. Photo by Abed Rahim Khatib / Flash 90

Palestinians outside a partially burnt mosque in the West Bank al-Mughayyir village, some 20 kilometres (12 miles) northeast of Ramallah on June 7, 2011. Palestinian security sources said Jewish settlers are to blame for the attack. The Israeli army confirmed the mosque had been torched, saying the military administration had received a complaint from residents and had sent a team of forensic experts to search for clues. Photo by Issam Rimawi / Flash90

Palestinian men inspect a partially burnt mosque in the West Bank al-Mughayyir village, some 20 kilometres (12 miles) northeast of Ramallah on June 7, 2011. Palestinian security sources said Jewish settlers are to blame for the attack. The Israeli army confirmed the mosque had been torched, saying the military administration had received a complaint from residents and had sent a team of forensic experts to search for clues. Photo by Issam Rimawi / Flash90

A Palestinian man inspects a partially burnt mosque in the West Bank al-Mughayyir village, some 20 kilometres (12 miles) northeast of Ramallah on June 7, 2011. Palestinian security sources said Jewish settlers are to blame for the attack. The Israeli army confirmed the mosque had been torched, saying the military administration had received a complaint from residents and had sent a team of forensic experts to search for clues. Photo by Issam Rimawi / Flash90

A Palestinian man inspects a partially burnt mosque in the West Bank al-Mughayyir village, some 20 kilometres (12 miles) northeast of Ramallah on June 7, 2011. Palestinian security sources said Jewish settlers are to blame for the attack. The Israeli army confirmed the mosque had been torched, saying the military administration had received a complaint from residents and had sent a team of forensic experts to search for clues. Photo by Issam Rimawi / Flash90

Palestinians stand near graffiti reading in Hebrew: "Price Tag" and "Alei Ayin", which is the name of a nearby Jewish settlement outpost demolished by Israeli police last week, sprayed-painted on the wall of a mosque which was vandalized in the West Bank al-Mughayyir village, some 20 kilometres (12 miles) northeast of Ramallah on June 7, 2011. Palestinian security sources said Jewish settlers are to blame for the attack. The Israeli army confirmed the mosque had been torched, saying the military administration had received a complaint from residents and had sent a team of forensic experts to search for clues. Photo by Issam Rimawi / Flash90

Palestinians stand near graffiti reading in Hebrew: "Price Tag" and "Alei Ayin", which is the name of a nearby Jewish settlement outpost demolished by Israeli police last week, sprayed-painted on the wall of a mosque which was vandalized in the West Bank al-Mughayyir village, some 20 kilometres (12 miles) northeast of Ramallah on June 7, 2011. Palestinian security sources said Jewish settlers are to blame for the attack. The Israeli army confirmed the mosque had been torched, saying the military administration had received a complaint from residents and had sent a team of forensic experts to search for clues. Photo by Issam Rimawi / Flash90