Iran denies its oil infrastructure has been successfully hacked by a government firm after reports of its disturbances online security of.
"Unlike western media, surveys conducted today show that it has not been successful. Cyber attack in the country's oil facilities and other critical infrastructure, "the government office said. security.
The statement did not specify which references it concerned.
However, it stated that the cause was unclear and that the impact was limited, affecting "online industry and government platforms" and specific providers.
Iranian telecommunications minister Mohammad Javad Azari Jahromi has previously acknowledged that Tehran "faces cyber-terrorism - such as Stuxnet".
The virus Stuxnet, which was discovered by 2010, is believed to have been built by Israel and the US to destroy nuclear facilities in Iran.
Iran then accused the US and Israel of using the virus to target the centrifuges used to enrich uranium.