Police and security sources were aware of the report which was released on the Facebook page of Mosul Eye, who purports to be a blogger in Iraq who set up the page "to communicate what's happening in Mosul to the rest of the world, minute by minute".
He opposes Isis 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.
On May 2, Mosul Eye posted: "Three girls, (Foreigners-British) married to [Isis] militants, reported missing, and [Isis] announced to all its check points to search for them. It is believed that those girls have escaped."
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 [Isis] 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)."
In his latest postings, on May 7, he talked of Isis 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.