South Korea said multiple government and private sector websites were hacked on Tuesdayís anniversary of the start of the Korean War, and Seoul issued a cyberattack alert warning officials and citizens to take security measures.
Government websites, including the one for the presidential Blue House, and some media servers were attacked, according to a statement from the science ministry. The statement said the sites were hacked and that a team was investigating.
The shutdown happened on the 63rd anniversary of the beginning of Korean War.
It wasnít immediately clear who was responsible, but both Koreas have traded accusations of cyberattacks in recent years.
South Korean officials say North Korea orchestrated a cyberattack in March that shut down tens of thousands of computers and servers at broadcasters and banks. Seoul in April said an initial investigation pointed to a North Korean military-run spy agency as the culprit.