The North Korean government's official Twitter account appears to have been hacked, with the feed calling for an uprising to remove the leaders from power.
The microblogging site ranted to its 11,000 followers about huge spending on nuclear weapons and leader Kim Jong-il's lavish drinking parties while 3 million people are starving and freezing to death.
The country's official YouTube site also seemed to have been hacked, with a cartoon being posted showing Kim Jong Un, the son of the leader, driving in a sports car and running people over.
The tweets, in Korean, were unlikely to harm the internal image of the country, as internet access is widely prohibited. However, the hacking will come as an embarrassment to the regime – especially as Saturday was thought to be the birthday of Kim Jong Un, the man believed to be poised to take over.
One tweet from @Uriminzok on Saturday read: "Let's create a new world by rooting out our people's sworn enemy Kim Jong Il and his son Kim Jong Un!"
Though it remains uncertain who coordinated the breach, South Korean citizen media sites and the Yonhap news agency attributed the scheme to South Korean hackers.