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Men stand in an alleyway of demolished buildings in the Yarmuk Palestinian refugee camp in the Syrian capital Damascus on April 6, 2015. Around 2,000 people have been evacuated from the camp after the Islamic State group seized large parts of it. At least 26 people, including civilians as well as fighters from IS and Palestinian factions, had been killed in the camp according to the Syrian Observatory for Human Rights. AFP PHOTO / YOUSSEF KARWASHAN (Photo credit should read YOUSSEF KARWASHAN/AFP/Getty Images)

Men stand in an alleyway of demolished buildings in the Yarmuk Palestinian refugee camp in the Syrian capital Damascus on April 6, 2015. Around 2,000 people have been evacuated from the camp after the Islamic State group seized large parts of it. At least 26 people, including civilians as well as fighters from IS and Palestinian factions, had been killed in the camp according to the Syrian Observatory for Human Rights. AFP PHOTO / YOUSSEF KARWASHAN        (Photo credit should read YOUSSEF KARWASHAN/AFP/Getty Images)