Iran claims to have found computer malware designed to target government institutions.
But despite the claims about the new malware, dubbed "Stars", Iranian authorities say its intended purpose is still unknown, according to the BBC.
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Stars is still under laboratory investigation, but Iranian officials say the malicious software is capable of inflicting only minor damage.
Stuxnet is widely believed to be the work of a nation state, and Iranian officials have accused the US and Israel of being behind it, although there is no firm evidence.
Gholamreza Jalali, commander of the Iranian civil defence organisation, says efforts to contain last year's Stuxnet infections are ongoing, according to US reports.
Jalali is calling on the foreign ministry to take action to stop the "cyber wars" against Iran.