Twitter Hacked by 'Iranian Cyber Army'

Dec. 18: A screenshot of Twitter.com shows the site defaced by a group calling itself the 'Iranian Cyber Army.'

Twitter, the popular micro-blogging service, was hacked early Friday morning by a group calling itself the "Iranian Cyber Army."

Users hoping to find their latest tweets were instead greeted by a black screen with a green flag.

Above the flag, in Arabic, read: "Hezbollah is victorious."

On the flag, in red Arabic writing: "Yassin" (an Arabic name written in bold) then in smaller Arabic print "the feast of peace."

Below the flag was more written in Farsi.

In English, the hackers wrote: "This site has been hacked by Iranian Cyber Army. U.S.A think they controlling [sic] and managing internet by their access, but they don't, we control and manage internet by our power so do not try to stimulation (sic) Iranian People To.....
Now Which Country is embargo list? Iran? Usa?
We push them in embargo list ; )
Take care."

Israeli Prime Minister Benjamin Netanyahu last week was quoted by a senior official as saying, "Using the Internet and Twitter against the Iranian regime is something extraordinary that the U.S. can do."

There is no evidence at this time that Iran or Hezbollah is behind the attack.

Fox News' Reena Ninan contributed to this report.