ISIS poster girl 'beaten to death' after trying to escape Syria

But both are now believed to be dead.

Information concerning Samra has been sourced from a Tunisian woman who claimed to have lived with them.

Although the Austrian government is refusing to comment – newspapers in the country have said Samra was beaten to death for trying to flee ISIS stronghold, Raqqa.

Both had been pictured in propaganda photos holding Kalashnikov guns in the last 12 months in Syria. 

Sabina is believed to have been killed last year when fighting, the United Nations reports.

David Scharia, of the UN, said: "We received information just recently about two 15-year-old girls, of Bosnian origin, who left Austria, where they had been living in recent years.

"Everyone, the families and the intelligence services of the two countries is looking for them.

"Both were recruited by Islamic State. One was killed in the fighting in Syria, the other has disappeared."

The teen pair went to the Turkish capital Ankara before intelligence services lost them.

An Islamic preacher from Bosnia living in Vienna – Mirsad O, known by the Islamic name "Ebu Tejma" was allegedly responsible for their radicalisation.

It is believed the pair married ISIS fighters soon after arriving in Syria.

(dailystar.co.uk)