An Iranian official said Monday that Iran has detected another cyber attack on the country, the semi-official Mehr news agency reported on Monday.

The commander of the Iranian civil defence organization, Gholam- Reza Jalali, told Mehr that Iranian scientists are succeeded in detecting the second malicious software of "Stars" developed to target the country.

Last year, the Islamic Republic said that the computer worm of "Stuxnet" infected 30,000 IP addresses in Iran which was mainly developed to hurt the country's nuclear program. But the Iranian Foreign Ministry denied reports that the cyber worm had damaged computer systems at the country's nuclear power plant.

"Stars" is compatible and cooperative with the system, Jalali said, adding that it is possible that it can be sometimes mistaken for governmental executable files.

Therefore, in the initial stages of the operation of virus its damage might be low, he said.

The Iranian experts should be very cognizant in studying different dimensions of the virus and then proceed to counter it, the official said.

He ruled out the total removal of the risks of Stuxnet, adding that viruses have a specific life span and after sometimes they may appear in different forms, according to the report.

Jalali did not elaborate further on the targets of the "Stars" cyber attack.

Earlier this month, a senior Iranian official said the German engineering conglomerate Siemens should be held responsible for the infection of Iranian industrial sites by Stuxnet.

"Siemens should explain why and how it provided the enemies with the information about the codes of the SCADA software (which is used at some of Iran's major industrial sites) and prepared the ground for a cyber attack against us," said Gholam-Reza Jalali, director of Iran's Passive Defense Organization.

Iranian officials should lodge a complaint against Siemens, he said.