ISIS and other rebel groups control most of the refugee camp , activists say . `` Never has the hour been more desperate '' in the camp , U.N. says . The United Nations said it is working with Syrian government officials to provide aid for those who have fled their homes since last week's fighting between rebels and forces loyal to President Bashar Assad.
ISIS and other rebel groups control most of the refugee camp , activists say . `` Never has the hour been more desperate '' in the camp , U.N. says . `` `` Reports of kidnappings , beheadings and mass killings , '' PLO official says .