Four banks in Iran have faced service disruption after what state media described as a “limited” cyberattack.

The state-run IRIB news agency, citing Alireza Qeitasi, secretary of Iran’s Banks Coordination Council, said there had been no “illegal access” to customer data and no information leak linked to the incident.

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According to the report, the disruption affected Bank Melli, Bank Tejarat, Bank Saderat and the Export Development Bank of Iran.

Banking officials said technical teams detected unusual activity and put in place protective steps aimed at shielding customer information and core banking systems.

Qeitasi said banking infrastructure across the country was in the hands of technical specialists, while work to secure systems and bring services back was moving ahead quickly.

Esmaeil Ariani, head of Iran’s Informatics Services Corporation, said problems affecting card services at Bank Tejarat and Bank Saderat had been fully fixed and transactions had resumed.

He said work was continuing to restore services at the other two lenders.

Iranian banks have been hit by cyber incidents several times in recent years, including Bank Sepah, particularly during periods of increased regional tension.

Alireza Gheytasi, the Secretary of the Coordination Council of Banks, said in an interview with the IRIB News Agency: “All relevant infrastructures are under the control of technical experts, and operations to secure and restore the systems are being carried out rapidly.” The official statement or comments from banking authorities did not reveal the source of the attack or suspected perpetrators, according to Iran Wire.