Since 2010, when Iran's nuclear program was hit by the Stuxnet computer virus, Iran and its arch-foes Israel and the United States have regularly accused each other of cyber attacks.
n Iranian general has said Israel and the United States were likely to have been behind a cyber attack that interrupted the distribution of fuel at service stations.
Tuesday's attack "technically" resembles two previous incidents whose perpetrators "were unquestionably our enemies, namely the United States and the Zionist regime", the Revolutionary Guards' Gholamreza Jalali said.
"We have analysed two incidents, the railway accident and the Shahid Rajaei port accident, and we found that they were similar," Jalali, who heads a civil defence unit responsible for cyber activity, told state television late Saturday.
In July, Iran's transportation ministry said a "cyber disruption" had affected its computer systems and website, according to Fars news agency.
And in May last year, the Washington Post reported that Israel carried out a cyber attack on the Iranian port of Shahid Rajaei in the Strait of Hormuz, a strategic route for global oil shipments.
Tuesday's cyber attack caused traffic jams on major arteries in Tehran, where long queues at petrol stations disrupted the flow of traffic.
The oil ministry later took service stations offline so that petrol could be distributed manually, according to the authorities.
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