Samra Kesinovic, 17, went to Syria in April 2014 with her 16-year-old friend Sabina Selimovic, where they became propaganda poster girls for the Islamist group.

Now several Austrian newspapers are claiming Samra has been beaten to death, citing insider sources and an interview with a Tunisian woman who lived with the pair before escaping.

Speculation about the fate of the girls has been spreading ever since a United Nations official said earlier this year that one of the girls had definitely died in Syria.