The hacker group Lulz Security has claimed it has brought down the public-facing website of the US Central Intelligence Agency. The alleged attack on CIA.gov occurred on the same day the group opened a telephone request line so its fans could suggest potential targets. On its Twitter feed, the group wrote: "Tango down - cia.gov - for the lulz". The CIA website was inaccessible at times on Wednesday but appeared to be back up on Thursday. It was unclear if the outage was due to the group's efforts or to the large number of internet users trying to check the site. The CIA would not confirm if it had been the victim of an attack. In a statement, a spokesperson told BBC News: "The CIA's public web site experienced technical issues that caused it to respond slowly for a short time yesterday evening. Those issues are now resolved."