The ISNA report said the malware had spread throughout Iran, but did not name specific sites affected. Foreign media reports have speculated the worm was aimed at disrupting Iran’s first nuclear power plant, which is to go online in October in the southern port city of Bushehr.

Iranian newspapers have reported on the computer worm hitting industries around the country in recent weeks, without giving details. Friday’s report also did not mention Bushehr.

The Russian-built plant will be internationally supervised, but world powers remain concerned that Iran wants to use its civil nuclear power program as a cover for making weapons.