The girls, thought to be aged around 16, were married off to IS militants but have since been reported missing, with the terror group now “thoroughly searching for them” after their escape.
The exact identity of the girls and their fate is not known.
The information on the girls could not be verified. It was released on the Facebook page of Mosul Eye, who purports to be a blogger in Iraq, and set up the page “to communicate what’s happening in Mosul to the rest of the world, minute by minute from an independent historian inside Mosul”.
He opposes ISIL and remains anonymous, writing in detail in both English and Arabic about the inner-workings of the group, their execution of civilians and casualties they suffer from coalition air-strikes.
In a later post he added: “The latest info I got on them is they are still on the run, but still in Mosul, and ISIL is thoroughly searching for them and hasn’t captured them yet.
“They are Brits, not immigrants, and they are very young teens (around 16 years old). That’s all I have about them for now.”
Three British schoolgirls from the Bethnal Green Academy, Shamima Begum, Amira Abase and Kadiza Sultana, disappeared from their homes in east London in February and flew to Turkey, before crossing the border into war-torn Syria.
It is understood they were following another 15-year-old girl who travelled there in December.
In March a High Court judge confiscated the passports of four other pupils at the school after concerns were raised by Tower Hamlets Council.
In earlier postings Mosul Eye warns of IS carrying out mass searches of homes, looking for laptops, mobile phones, tablets and other devices, warning: “Please delete all your browsing history from anything related to politics, ISI, adult content, music, movies, pro-government pages.
“Please spread this around. We might go MIA for a few days until this is over.”
IS are reportedly unpopular with much of the local population and appear to be increasing the terror in the city as their losses mount.
In his latest postings, on May 7, the historian behind Mosul Eye talks of IS militants plundering money from locals, whipping a young man 60 times for not closing his shop during prayer time and the public executions of civilians for minor transgressions of Sharia law.
He also details increasing casualties for IS from coalition air-strikes.