"Based on the confessions made by a number of terrorists captured in Iran, it has been observed that the terrorists are not faced with any limitation to access the basic materials – which are very ordinary materials- needed to build different IEDs with high destructive power and they buy them from shops in disguise and as a normal customer," the security official who called for anonymity told FNA on Sunday.
He said that the ISIL orders its members to purchase their needed materials from city shops in order not to attract the attention of the security officials.
His remarks came after the Iranian intelligence ministry announced in a statement that the country's security forces have traced and captured the remaining members of a recently busted Takfiri terrorist group in Western Iran.
"Other members of the recently busted Takfiri terrorist cell in western Iran who were at large, have been arrested in Kermanshah province in Western Iran," the intelligence ministry said.
The ministry's statement read that following the first blow to the Takfiri team on August (15-16), the rest of the Takfiri terrorists were arrested on Thursday (August 18). The ministry noted that a significant amount of arms, bomb making equipment, suicide vests and explosive belts were discovered from the terrorists' hide-out.
On Tuesday, a police commander said that four Takfiri terrorists were killed in armed clashes with the Law Enforcement Police in Western Iran
Commander of Kermanshah province's Law Enforcement Police Brigadier General Manouchehr Amanollahi said that an explosive vest and other military equipment were seized during the operations.
Meantime, Deputy Interior Minister Hossein Zolfaqari told reporters that ten Takfiri terrorists were chased by the Iranian security forces after entering Kermanshah city and "four of them were killed and 6 others were captured in clashes in one of Kermanshah's neighborhoods".
He said one of those killed in the clashes was a top commander of the Takfiri terrorists in Iraq.
Stressing that the militants had entered Iran with the aim of conducting sabotage acts, he said, "A Kalashnikov rifle, two magazines and an explosive vest were discovered and seized from the Takfiri elements."
The terrorists' attempts to create insecurity in Iran were foiled after the ISIL in a statement on Wednesday underlined its support for the terrorists killed in Iran, and threatened to launch acts of reprisal.
In the statement, the ISIL called the terrorists who have been killed in operations or executed after their capture in Iran as the "Sunni youth", and threatened the Iranian government with revenge.
The statement also described the Iranian government as "Rafidah (heretic)", and promised the families of the slain terrorists to wait for the revenge of their sons by the ISIL.
The Iranian intelligence ministry announced in a statement earlier this month that the country's security forces have traced and captured or killed 102 members of a terrorist group who carried out operations mostly in Western and Northwestern Iran.
"102 members and supporters of the Takfiri terrorist group called Tohid and Jahad have been identified in operations and prosecuted judicially; some of them have been killed in armed clashes with the Law Enforcement Police and security forces and a number of others have been arrested and executed or sentenced to prison terms," the statement said.
The statement said that the group has a record of armed robbery, attacks against the police forces and killing civilians and governmental officials.
The terrorist group had killed 20 Iranian people and wounded 40 others in different cities of Western and Northwestern Iran, including Kurdistan people's representative at the Assembly of Experts martyr Mohammad Sheikholeslam and prominent Sunni cleric martyr Borhan Aali, it added.
In another development last week, Iranian Interior Minister Abdolreza Rahmani Fazli announced that the country's security forces have defused the terrorists' plots to blow up a military base used both by the Law Enforcement Police and the Islamic Revolution Guards Corps (IRGC) in Eastern Iran.
"As I said before, the terrorists sought to blow up one of the bases which was both used by the Law Enforcement Police and the IRGC," Rahmani Fazli said.
"The terrorists had dug a tunnel to this end, but were stopped before taking any action," he added.