What happened

A cyberattack disabled the nationwide system allowing Iranian motorists to buy government-subsidized fuel with state-issued smart cards, affecting all of the country's roughly 4,300 gas stations. Long queues and traffic disruption followed as many drivers could only buy fuel at the unsubsidized rate; digital billboards in Tehran and Isfahan were also compromised, and affected pump screens displayed a message including a phone number linked to the Supreme Leader's office. Iran's oil minister said the fuel-supply system itself was not compromised and that stations continued dispensing fuel manually. About 3,200 of 4,300 stations had been reconnected to the card system within four days.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.