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TEHRAN — The Stuxnet computer worm has infected 30,000 computers in Iran but has failed to "cause serious damage," Iranian officials were quoted as saying on Sunday.

Some 30,000 IP addresses have been infected by Stuxnet so far in Iran, Mahmoud Liayi, head of the information technology council at the ministry of industries, was quoted as saying by the government-run paper Iran Daily.

Stuxnet, which was publicly identified in June, was tailored for Siemens supervisory control and data acquisition (SCADA) systems commonly used to manage water supplies, oil rigs, power plants and other industrial facilities.

Stuxnet is able to recognize a specific facility's control network and then destroy it, according to German computer security researcher Ralph Langner, who has been analysing the malicious software, or malware.