Hacking collective LulzSec's day of celebration, hacking the U.K.'s Serious Organised Crimes Agency and census databases, has been soured as news comes that the Metropolitan Police have arrested a suspected member of the collective.

The arrest

London's Metropolitan Police Central e-Crime Unit arrested the 19-year-old suspected LulzSec member earlier today.

The man was charged for his suspected involvement in LulzSec's laundry-list of cyber attacks. The most recent attack being LulzSec's distributed denial of service attack on the Serious Organised Crimes Agency's website.

The arrest was revealed in a statement posted on the Metropolitan Police's website earlier today.

The man's arrest was apparently the result of "a pre-planned intelligence-led operation" that was carried out by both the Metropolitan and Essex police forces, as well as the FBI.

Details about what evidence was discovered during the police's search of the mans Wickford, Essex address remains vague.

"Searches at a residential address in Wickford, Essex, following the arrest last night have led to the examination of a significant amount of material. These forensic examinations remain ongoing", read the police's statement.

Since the arrest was announced LulzSec responded via Twitter commenting, "Seems the glorious leader of LulzSec got arrested, it's all over now... wait... we're all still here! Which poor bastard did they take down?".

The attack SOCA

The attack on SOCA was first revealed when a message went up on the LulzSec's Twitter feed yesterday evening. The tweet read, "Tango down - http://t.co/JhcjgO9 - in the name of #AntiSec".

SOCA's website subsequently went down and was still down at the time this article was written. A subsequent post on LulzSec's Twitter page indicated that the group may well have targeted the site with a distributed denial of service cyber attack.

DDoS attacks overload websites and networks with requests to the point that they cease to function. Anonymous used the technique in its own campaign against the Turkish Government earlier this year.

The census hack

The hack on the U.K. census was reported today after LulzSec posted a statement on the Pastebin website.

The post claimed, "We [LulzSec] have blissfully obtained records of every single citizen who gave their records to the security-illiterate UK government for the 2011 census".

The group went on to promise that it would release the information stolen after it had prepared it for publication, "We're keeping them under lock and key though... so don't worry about your privacy (...until we finish re-formatting them for release)".

The authenticity of LulzSec's claimed attack on the census database is yet to be verified.

UPDATE: LulzSec has since denied responsibility for any involvement in the attack on the census' database.