America's top cyber-soldier has warned that cyber attacks on Iran were turning it into a 'force to be reckoned with'.
Since 2010, Iran has come under attack many times by malicious viruses that targeted industrial installations in the country. 
General William Shelton, who oversees US cyber-operations, said that the repeated attacks have provoked Iran to improve its cyber-capabilities , the BBC reports.
He said that it meant that Iran was becoming a growing force in web-based attacks.
General Shelton issued the warning during a briefing given to reporters about the US Air Force division he heads that included America's cyber-troops.
According to the report, he said the 2010 Stuxnet virus attack on Iran's Natanz uranium processing plant had generated a 'reaction' by Iran that had led it to rapidly improve its defensive and offensive cyber-capabilities. Since then Iran has been hit again and again by viruses.
In December 2012, the Stuxnet virus returned and hit companies in the southern Hormozgan region. That improved capability had helped it protect itself against subsequent attacks on oil terminals and other manufacturing plants, the report added.