Two jihadi brides have escaped from Islamic State's female police force and revealed the horrifying punishments they used to inflict on other women. Doaa and Umm, whose names have been changed to conceal their identities, were smuggled from Raqqa, in Syria, to southern Turkey after leaving the al-Khansa Brigade earlier this year. The pair said they used to be heavily involved in punishing others who did not obey the group's rules - including giving 60 lashes to those who tried to flee. Scroll down for video . Doaa and Umm (above), whose names have been changed to conceal their identities have revealed what life was like working for the brutal al-Khansa Brigade . In an interview with Sky News Doaa, who left after her Saudi Arabian husband blew himself up in a suicide attack, said women also received a 'standard' 40 lashes if they did not wear proper Islamic dress. The 20-year-old, who was paid around £70 a month by the unit, said: 'What upset me most was lashing old women when they weren't wearing the proper clothes.' Umma, 25, was forced to marry a foreign fighter. She said did not see him very much as he was often on the front line. 'Most of the time I would stay at my parents’ house because he wasn't around. He behaved normally, he would come home for two or three days and then go back to fight,' she said, adding that she did not love him. Now the pair, who are living in Turkey illegally, are scared they will be discovered by ISIS fighters who, they believe, are following them. The al-Khansa Brigade operates as an ultra-oppressive police force monitoring the behaviour of females in Raqqa. The women revealed they used to be heavily involved in punishing others who did not obey the group's rules - including those who tried to escape. Above, one of the women shows a picture of herself holding a gun . The al-Khansa Brigade operates as an ultra-oppressive police force monitoring the behaviour of females in Raqqa. Above, other women from the brigade are pictured holding guns . It achieved notoriety last year after women who travelled to join the Islamic State's insurgency boasted of joining the police unit. They used social media to brag about doling out savage beatings and lashings, ordering executions and managing brothels where thousands of sex slaves are believed to be imprisoned and raped daily. In the brigade's first manifesto, released in February, women are told to live a completely 'sedentary' lifestyle. It adds that their role should be primarily to remain 'hidden and veiled' and at the service of men, who are described as their masters. While it claims not to have been written or approved by ISIS's leadership, it provides a disturbing look at the way women are treated. Last September a Syrian woman agreed to carry a hidden camera to film daily life in Raqqa. Her footage showed several gun-wielding French women who had left their home country to join ISIS (above) The women’s revelations come a day after a shocking new video appearing to show at least 30 Christians being beheaded and shot by ISIS in Libya was released. The 29-minute video, titled 'Until It Came To Them - Clear Evidence', showed dozens of militants holding two separate groups captive, thought to be in the south and the east of the country. At least 16 men, described by Islamic State as the 'followers of the cross from the enemy Ethiopian Church', were lined up and shot in a desert area while 12 others were filmed being forced to walk down a beach before being beheaded. It followed another video in February of the beheading of a group of 21 Coptic Christians on the beach in Libya, though that terrain was rockier than the one shown in the latest film.
Doaa and Umm were smuggled from Raqqa, in Syria, to southern Turkey .
Both used to work for the group's female police unit, the al-Khansa Brigade .
Women reveal the different levels of punishment given out by the unit .
They believe they have been followed by ISIS fighters since escaping .