The Irish High Court can't deport the man, who was the "foremost organizer and facilitator of travel by extremists prepared to undertake violent action on behalf of ISIL," based on the argument that he may be tortured in his home country, the source said.
The 52-year-old man, whose name cannot be named for security reasons, has been living in Ireland for the last 15 years and didn't even bother to show up to his court hearing on Wednesday.
Although earlier this week it had appeared that the Irish High Court gave the green light for the deportation of the man, but he challenged the court's decision.
The man said he had already been tortured in his home country and now since he was profiled as a Daesh supporter he would face the same if he was sent back. He used Article 3 of the European Convention of Human Rights, which guarantees absolute protection from torture and inhumane treatment, to back up his argument, UTV Ireland said.
Daesh, which is outlawed in Russia, has seized large areas in Syria and Iraq and declared a caliphate on territories under its control. The group is currently considered to be one the main threats to global security. According to reports, Daesh jihadists are trying to expand their influence in North African countries, particularly in Libya.
Daesh has claimed responsibility for terrorist acts in France, Denmark, Saudi Arabia, Turkey, Egypt, Lebanon, Mali and Tunisia, among other countries, in 2015.
Out of some 31,000 foreign fighters thought to be in Iraq and Syria, 5,000 are believed to have come from Western Europe, while slightly less, some 4,700, are estimated to have traveled from the Commonwealth of Independent States (CIS). In descending order, Tunisia, Saudi Arabia, Russia, Turkey and Jordan are the five largest contributors of foreign fighters to Daesh.