According to Maan, the detained extremist militants signed their confessions, Xinhua news agency reported.
Maan said that the extremist militants were captured following the liberation of Anbar in late 2017, and that they are responsible for killing civilians from al-Bun Nimr tribe for refusing to join the extremist group.
Al-Alwani called on the Ministry of Interior and Iraqi Prime Minister Adel Abdul Mahdi to support the directorate of intelligence and counter terrorism in Anbar.
In December 2017, Iraq declared full liberation from the IS after the security forces and the paramilitary Hashd Shaabi units, backed by the anti-IS international coalition, recaptured all areas once seized by the extremist group.
However, IS remnants have since melted in urban areas or resorted to deserts and rugged areas as safe havens, carrying out guerilla attacks from time to time against the security forces and civilians.