South Korea has issued a cyber-attack alert following a hacker assault on a number of official websites, including the presidential Blue House.The attacks happened on the anniversary of the start of the Korean War.
The coordinated attack began at 01:45 GMT (10:45am local), with a few posts claiming to be the work of the hacktivist group Anonymous.
The organization denied any involvement on its official Twitter account, but said it had succeeded in hacking a number of North Korean media websites on Tuesday, including the official Korean Central News Agency (KCNA) and the ruling party newspaper, Rodong Sinmun.