The U.S. government's Voice of America news site was taken down this week, in an attack claimed by hacktivists called the Iranian Cyber Army.
The hackers managed to alter the VoA's DNS settings to redirect traffic to a site they controlled.
The site carried a message addressed to Secretary of State Hillary Clinton, demanding that the US "stop Interfering in Islamic countries."
Voice of America confessed on its Facebook page, of all places that: "On Monday, February 21, VOANews.com's primary domain, along with numerous related domains registered with Network Solutions, were hacked by an unknown party. This enabled the hacker to redirect VOA URLs to a site claiming to be run by a group called the 'Iranian Cyber Army'".
The Voice of America sites have been restored.
The Iranian cyber Army has previously managed to hack into and deface Twitter as well as Chinese search engine site Baidu, using similar tactics.