Updated at 11:45 p.m. ET: cia.gov is back up, although it is loading slowly, about nine hours after it was reported to be down, followed shortly by a claim that the hacker group Anonymous was responsible.

Updated at 7:10 p.m. ET: cia.gov remains inaccessible four hours after it was first reported to be down, followed shortly by a claim that the hacker group Anonymous was responsible. As security experts have noted, that's an unusually long time if the attack really is a straightforward DDoS assault. 

• Posted: 2012 Feb 11 at 04:50
• Read story