The website of the hacker group Lulz Security (LulzSec) was reportedly brought down by a DDoS attack believed to have been led by a disgruntled hacker, known as the Jester.

According to a blog in the Guardian, the lone-wolf hacker initially claimed to have downed the LulzSec website. However, other hackers have also claimed responsibility for the outage that is said to have taken place on Friday morning.

LulzSec has said that the work is not by Jester. It said, "That clown Jester taking credit for other people’s work again? Our site has had 24/7 heavy DDoS attempts for weeks. Good old CloudFlare!"

However, the website seems to have recovered from the attacks.

Another lone-wolf hacker, Oneiroi, has said claimed responsibility for the attack. Oneiroi said, "I’d like to let the public know that phase one of OPERATION SUPERNOVA has been successful. Lulzsecurity.com is Tango down at this time. The attack will stop by Midnight PST."

Oneiroi added, "Also, Cloudflare is not my target. Please don’t argue that lulzsec is up. Cloudflare creates a backup of the website. It’s doing its job. I want to make it bloody clear that Cloudflare isn’t my target."

Meanwhile, The Daily Mail has reported that a rival of LulzSec has threatened to expose the real names of the members of LulzSec.

In an interview with Fox News, a member of the group Hex0010 said, "We’re here to show the world that they’re nothing but a bunch of script kiddies."

"We’re going to let them do what they do. Then we’re going to do what we do," he said.

"We’re going to hit them hard."

Hex also said that the next target to be identified would be from California.

LulzSec has previously claimed responsibility for several hack attacks including a US Senate website, Sonypictures.com and a CIA website as well.

Recently, LulzSec said that the group along with online hacktivist group Anonymous would target government agencies in their war against efforts to regulate the Internet.

Earlier this month, the Spanish police claimed that it had arrested three ‘leaders’ of the group, which was denied by LulzSec. This week the UK police with the help of the FBI have detained a teenager in connection to the hack attacks by LulzSec.

But LulzSec claims that it does not have a centralised structure. Its members are said to be in different countries across the world.