SAN FRANCISCO (AFP) - A CIA website was apparently knocked out of commission by hackers on Wednesday. The US spy agency's cia.gov website stopped responding and members of a Lulz Security hacker group claimed credit in a message at microblogging service Twitter. Attempts by AFP to reach the website were met with a message saying the Web page was not available. "Tango down - cia.gov," the Twitter message read. "For the lulz." A CIA spokesman was not available for comment.