An activist from the Syrian city of Raqqa, Abu Ibrahim Al Raqqawi told CNN that IS fighters were obsessed with sex. "IS fighters are really sex-mad and some of them have two and three wives, and even then they are still trying to find slaves among Yazidi girls," Al Raqqawi says. He added that Al Raqqa city was becoming a big prison for women, pointing out that women under the age of 45 were not allowed to leave the city. Al Raqqawi added that more than 270 cases of forced marriage to IS fighters have been reported in Raqqa. Raqqa is one of the largest cities in Syria, and considered the IS de facto capital.