Intelligence services have identified the new leader of the "Islamic State of Iraq and Syria" (ISIS) as Amir Mohammed Abdul Rahman al-Mawli al-Salbi, British newspaper the Guardian reported Monday (January 20th).

The paper, citing officials from two unnamed spy services, described him as one of the group's founding members and said he had led the enslavement of the Yazidi minority in Iraq.

It said he also oversaw operations around the world.

The extremist group had named Abu Ibrahim al-Hashimi al-Qurashi as its new head just days after its previous leader, Abu Bakr al-Baghdadi, was killed in a raid by US special forces in October.

The US State Department added him to its list of most wanted terrorists in August, describing him as a "potential successor" to al-Baghdadi and offering a reward of up to $5 million for information leading to his capture.

Some analysts have suggested the group was caught off guard by al-Baghdadi's killing and that the true identity of its new leader remained uncertain.

Unfamiliar nom de guerre

The Guardian said al-Salbi was selected within hours of the death and that al-Qurashi was a nom de guerre not recognised by other senior leaders or intelligence agencies.

The newspaper described him as "a hardened veteran in the same vein as al-Baghdadi, unflinching in his loyalty to the extremist group".

It said he was born into an Iraqi Turkmen family in the town of Tal Afar, and is one of the few non-Arabs among the group's leadership.

Holding a degree in sharia from the University of Mosul, he rose through ISIS's ranks in part thanks to his background as an Islamic scholar, the paper added.

Al-Salbi gave religious rulings that underwrote the attempted genocide of Yazidis by ISIS, it said.

The US State Department said he was one of ISIS's "most senior idealogues" who had "helped drive and justify the abduction, slaughter, and trafficking of the Yazidi religious minority in north-west Iraq and is believed to oversee some of the group's global terrorist operations".

In 2004, he was detained by US forces in Camp Bucca prison in southern Iraq where he met al-Baghdadi, according to the Guardian report.