A week ago, the country's oil ministry confirmed that it and other facilities in the energy industry had been .

Today, the said that Esmaeil Ahmadi-Moqaddam, Iran's national police chief, had claimed that his office has "found clues about recent cyberattacks on a number of Iranian ministries and companies."

Mehr is a semi-official arm of the Iranian government.

The report did not spell out what "clues" police had found, or which ministries and companies had been attacked.

"In cooperation with the Information and Communications Technology Ministry, the Intelligence Ministry, and the ministries which have been targeted by cyber attacks, we are investigating and pursuing the matter...and we have found clues in this relation," Mehr quoted Ahmadi-Moqaddam as saying.