The 'Independent.uk' reported that the girls have grown disillusioned by life with Isis.
The girls - 15-year-old Sabina Selimovic and 17-year-old Samra Kesinovic - reached middle-east via Turkey. They were initially used as poster girls for ISIS. The militants spread their pictures on social media to show that they were having fun with the terror group.
Reportedly, the social media accounts associated to the girls were operated by Isis to encourage other girls to follow the suit.
Although the girls left a note at home before leaving for Syria in April saying, "Don't look for us. We will serve Allah - and we will die for him", the Interpol took up the case, says the Independent report.
The Austrian government on Sunday said the girls want to come back, and have been in contact with their families, the Austrian newspaper Oesterreich reported. But the homecoming, escaping Syria after such a long time, would be very tough, says officials.
Allegedly, the girls have been married to Chechen fighters and that they may be pregnant. Also, the Austrian law might prevent them from coming back after joining a foreign war.