Twitter was attacked by a group of Iranian hackers last night. A group, calling itself the Iranian Cyber Army, compromised DNS records and redirected visitors to a page showing the Iranian flag.
The attack lasted over an hour, according to Twitter boss Biz Stone.
"Twitter's DNS records were temporarily compromised tonight but have now been fixed. As some noticed, Twitter.com was redirected for a while but API and platform applications were working. We will update with more information and details once we've investigated more fully."
The redirect took users to a page that said in English and Arabic: "This site has been hacked by the Iranian Cyber Army. The USA thinks they control and manage internet access, but they don't. We control and manage the internet with our power, so do not try to the incite Iranian people."
The attack follows the widespread use of the microblogging site by Iranians earlier this year protesting at the outcome of what was widely seen to be a rigged presidential election.