Iranian President Ebrahim Raisi (AP Photo)

Iranian President Ibrahim Raisi underlined on Sunday that Iran's enemies threatened Iranian oil buyers and prevented the release of the national oil revenues, but, he added, they still sold oil and returned to the pre-sanctions stage.

"Iran's enemies tried to impose restrictions on our industries and trade with the aim to isolate Iran, but they also failed, because Iran has strong relations with all Asian countries," Raisi said when receiving the heads of a number of Iranian universities.

"Iran continues to develop, and this development is precisely the enemy's problem," the Iranian President noted.

Raisi: Officials have duty to maintain calm, security in country

During today's meeting of the Iranian Cabinet, Raisi praised the large public attendance of the various segments of the people at the funeral procession of the victims of Wednesday's terrorist attack on the holy shrine of Shah Cheragh.

Raisi explained that "officials have the duty to exert all their efforts to maintain calm and security in the country and to remove obstacles that stand in the way of work, jobs, education, and living situation."

Last Wednesday, 15 were martyred and 40 were wounded in a terrorist attack that targeted the Shah-e-Charagh shrine in Shiraz, and the attacker was arrested following his injury. ISIS claimed responsibility for the attack.