Turkish authorities suspect they may have prevented a terrorist attack on the same day that ISIS gunmen killed over 120 people in Paris.

A high-profile extremist, thought to be Aine Lesley Davis, was detained last week in Istanbul. He was arrested along with a group of others, according to a Reuters source, who may have been planning a co-ordinated, parallel attack on Friday.

Davis is part of a contingent of British jihadists who were charged with guarding foreign hostages, along with Mohammed Emwazi, or 'Jihadi John,' whom the Pentagon says was killed in a drone strike on ISIS' capital Raqqa on Friday.

It has also emerged that Iraqi intelligence warned coalition nations of an imminent threat from ISIS the day before the Paris attacks.

AP reports a dispatch which said ISIS leader Abu Bakr al-Baghdadi had ordered an attack on countries involved in fighting the extremist group in Syria and Iraq.

No specific details were offered, but several of the senior officials behind the dispatch warned France particularly of an attack.

Two officials told AP that the attacks appear to have been planned in Raqqa, where gunmen were trained for the operation, who then linked up with a sleeper cell in France. 24 people in total were involved, they say.