China has accused the United States of using a "cyber army" to foment unrest in Iran.
The People’s Daily, China’s Communist Party mouthpiece, said America was exploiting social media such as Twitter and YouTube to generate protests against the Iranian regime.
It came after Secretary of State Hillary Clinton called for internet freedom in China following Google’s claim that it had been the victim of a major hacking attack.
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"Behind what America calls free speech is naked political scheming. How did the unrest after the Iranian elections come about?" said the editorial, signed by Wang Xiaoyang.
"It was because online warfare launched by America, via YouTube video and Twitter microblogging, spread rumours, created splits, stirred up, and sowed discord between the followers of conservative reformist factions."
China has blocked YouTube since March, the anniversary of uprisings in Tibet, and Twitter since June. Facebook has been down since early July.
The People’s Daily editorial asked rhetorically if obscene information or activities promoting terrorism would be allowed on the internet in the US.
"We’re afraid that in the eyes of American politicians, only information controlled by America is free information, only news acknowledged by America is free news, only speech approved by America is free speech, and only information flow that suits American interests is free information flow," it said.
Mr Clinton’s speech came shortly after Google revealed a sophisticated hacking attack, and said it might close its google.cn Chinese search engine if it could not find a way to offer a legal, unfiltered search service in China.