South Korea Tuesday accused the Pyongyang government of hacking into several of its official websites and media outlets last month.
The investigation team traced an internet protocol (IP) address used in the hacking to North Korea, according to Seoul's science ministry.
Seoul also said that malicious codes and techniques were found similar to past attacks from North Korea.
The two countries routinely accuse each other of cyber crimes and last month's hacking is the latest in a series of such attacks.
The latest attack, which came on the 63rd anniversary of the start of the Korean War, shut down several South Korean websites including the website of the presidential Blue House and the conservative ruling party and several other media outlets.
However, the Pyongyang government denied the accusations and hit back saying that its own websites were victims of Seoul and U.S. hacking groups.
Cyber attack accusations are a routine between the two countries especially after a series of nuclear and missile tests that Pyongyang conducted this year.
China who is North Korea's best ally, has distanced itself from the Pyongyang government in recent months as a result of pressure from the Washington government over the escalating tensions in the Korean Peninsula.
Tensions forced the closure of a jointly operated Kaesong industrial park in North Korea in April and the two sides last Monday held a third round of talks but failed to arrive on an agreement on reopening the park.
The two side will again meet on Wednesday, according to Kim Ki-woong, the chief South Korean negotiator.
