UPDATE: The North Korean news agency's Twitter and Flickr pages have now been confirmed to have been hacked.

Hackers claiming to represent the Anonymous collective have threatened cyber war on North Korea.

Kim Jong-Un's despotic government in the north has made increasingly hysterical threats to the US and South Korea in recent weeks, leading to a dramatic escalation of tension in the region.

Acting independently of national interests but for the "journey to freedom" of the North Korean people, a group of hackers is now wading into the mire.

In a note posted online - anonymously, naturally - the group said that it had more than 15,000 usernames and passwords for uriminzokkiri.com, local intranet, mail servers and website systems.

To prove that it had the data the group released six records online. The Next Web said that based on the account names three were Chinese and three North Korean.

"First we gonna wipe your data, then we gonna wipe your badass dictatorship "government", the group said.

READ MORE: Civilian Hackers 'Legitimate Targets In War' Says Nato Manual

It is not clear if the group really has the data it claims, or what wing of Anonymous - if any - is carrying out the attack. None of the sample data related to internal North Korean systems, and there is no obvious way that the network - which is reportedly not connected to the wider internet - could be hacked.

But the note echoed previous sentiments by Anonymous and other hackers that it would strive to bring "this oppressive government down".

A series of wider attacks under the banner #OpNorthKorea left some websites in North Korea impossible to access, while more are planned for April 19 and June 25 according to North Korea Tech.

The group demanded an end to the North's threat of nuclear attack, for leader Kim Jong-Un to resign, uncensored internet for all citizens and a free democratic government to be installed.

The note says:

"This is not about country vs country - This is about we, the people, the 99% (of USA and of North Korea) vs oppressing and violent regimes (like USA gov. and N.K. gov)! We, the people, are gathering together because we are stronger now and we won't fight your wars anymore."

It added that North Korea's citizens should not "fear us".

"Don't fear us, we are not terrorist, we are the good guys from the internet," the note said, before the traditional ending for Anonymous notes - "We do not forgive, we do not forget, expect us!".