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Israeli soldiers take position in a field during clashes with Palestinian demonstrators, following the funeral of 27-year-old Palestinian Mohammed Jasser Karakra, in the Sinjil village, in the Israeli occupied West Bank, on April 13, 2015. Karakra stabbed two Israeli soldiers in the northern West Bank on April 8, 2015, wounding one seriously before being shot dead. It was the second knife attack in a week targeting Israeli soldiers and the latest in a wave of lone-wolf attacks which have been on the rise since last summer's 50-day war in the Gaza Strip. AFP PHOTO / ABBAS MOMANI (Photo credit should read ABBAS MOMANI/AFP/Getty Images)

Israeli soldiers take position in a field during clashes with Palestinian demonstrators, following the funeral of 27-year-old Palestinian Mohammed Jasser Karakra, in the Sinjil village, in the Israeli occupied West Bank, on April 13, 2015. Karakra stabbed two Israeli soldiers in the northern West Bank on April 8, 2015, wounding one seriously before being shot dead. It was the second knife attack in a week targeting Israeli soldiers and the latest in a wave of lone-wolf attacks which have been on the rise since last summer's 50-day war in the Gaza Strip. AFP PHOTO / ABBAS MOMANI        (Photo credit should read ABBAS MOMANI/AFP/Getty Images)