Twitter Hijacked by 'Iranian Cyber Army'

Twitter was hacked last night, leaving millions of microbloggers tweetless for two hours. During that time, those who tried to access the site were greeted by a green flag and a strange message: "This site has been hacked by Iranian Cyber Army." The hackers also left this message: "USA think they controlling and managing internet by their access, but they don't, we control and manage internet by our power," the BBC reports.

It is unclear who, exactly, is behind the attack and the message, but Twitter and Iran certainly have history. After this summer's disputed presidential election, the country's opposition used the Web site to circumvent state censorship. Anti-government protesters posted pictures of rallies and used the site's global network to expose police brutality and gather support.

(More Twitter stories.)