Eleven medical students and doctors of Sudanese origin went to Syria to provide medical assistance to IS. Members of the group sent text messages saying they were treating hospital patients. An estimated 20,000 foreign fighters and supporters have flocked to Syria and Iraq to prop up IS. The Washington Post reported special treatment and better pay for the foreign recruits have made local fighters resentful. Foreign fighters live in cities where there’s less chance of airstrikes while Syrian fighters serve in more vulnerable rural outposts. IS is paying foreign fighters $800 a month, but Syrians half that amount causing mounting unrest in IS. Meanwhile nine members of IS were killed during infighting after they tried to flee over the Turkish border. It is not the first time that IS has killed its own members. They killed 120+ of their own fighters in two months, mostly foreigners trying to return home.