Security authorities have taken a preemptive move uncovering a cell of the terrorist organization, the Islamic State in Iraq and the Levant (ISIL), comprising five Kuwaitis, the Ministry of Interior announced early on Thursday.

The detainees confessed they had received "courses about doctrine of the terrorist organization, its deviating thoughts, in addition to advanced training on using arms before taking in combat action in Syria and Iraq," the MoI said in the official statement.

One of the uncovered terrorists was identified as Mubarak Malfi, born in 1986, it said, adding that he had been killed in a terrorist operation in Iraq. Another was identified as Fahad Hamad, born in 1990. Security personnel found in the latter's house "takfiri books, contents of which urge for fighting and carrying out terrorist acts," in addition to flag of the terrorist organization, the ISIL.

"Takfiri" is an Arabic word that indicates rejection of religious beliefs of the same sect or another.

The MoI identified the other members of the uncovered cell; namely Mohammad Hamad, born in 1986. He had joined the organization in Mosul and had taken part in combat and Faleh Nasser, born in 1982. The latter had also joined the organization in Mosul and had participated in combat, Mohammad Falah, born in 1990, who had facilitated the others' travel to Iraq to take part in terrorist operations.

The ministry vowed that it would spare no effort in clamping down, firmly, on any person who may try to undermine the homeland's security. Pre-emptive precautions will be in force against any terrorist acts and terrorists will be brought to justice.

The detainees were referred to the general prosecution, under the state felony case, number 47/2015.