He worked in Dublin for 10 years

A 45 year old Irish citizen has been arrested by a group fighting ISIS in Syria.

Alexandr Ruzmatovich Bekmirzaev was detained when patrols targeted a terror cell at Deir ez-Zor in the east of the country on December 30th, along with 4 other men.

The Kurdish backed Syrian Democratic Forces or SDF made the arrests after breaking up a terror ring that was preparing to attack civilians who were fleeing the war zone.

He was originally from Belarus but lived and worked in the capital for about 10 years before leaving in 2013 for the Middle East.

It's understood the man was put on a watchlist after Gardaí received information that he was an active supporter of radical Islamist Groups.

The Department of Foreign Affairs says it's investigating the circumstances surrounding the arrests.

The Taoiseach has said he is aware of the case but cannot comment in any detail. 

The Department of Foreign Affairs says it will provide the appropriate assistance if asked.