An Iranian minster said Wednesday Tehran had recently thwarted a "highly organized cyber-attack" targeting its e-government infrastructure.
The threat "was successfully identified and repelled by the country's cyber security shield," said telecommunications minister Mohammad Javad Azari Jahromi, according to the ISNA and Mehr news agencies.
The minister described the attack as "really massive" and "state-sponsored," according to statements reported by Mehr.
"I can't disclose any details right now," he said, adding that he could also not yet disclose which country allegedly attempted the attack.
But "there will certainly be a report on it later," he said.
ISNA reported the minister had said authorities were "studying the extent of this cyber-attack".
In late September, the Iranian energy sector was put "on full alert" to the threat of "physical and cyber" attacks a few days after Tehran denied media reports that its oil installations had been disrupted by a cyber-attack.