South Korea has accused North Korea's top intelligence agency of masterminding the March cyber attacks that hit its banks and broadcasters, adding to the growing tensions between the two nations.
South Korea's Ministry of Science, ICT and Future Planning linked the North to a number of cyber attacks on businesses and government agencies in a research paper on Wednesday.
The report said initial research suggests the attacks were mounted by special elite unit consisting of thousands of cyber warfare experts within North Korea's Reconnaissance General Bureau in Pyongyang.
The ministry said that the attacks bared similarities to previous attacks stemming from North Korea.
"Last March broadcasters and financial corporations were the targeted with computer attacks designed to cause equipment destruction through the distribution of malicious code," read the report, (translated with Google Translate).
"The North Korean hackers attack has a unique identification number that is the same as that seen in past programmes source code."
The team said the code in question has been used in attacks mounted up to eight months ago.
The Korean ministry said it has also managed link 22 of the 49 internet protocol addresses involved in the attack to campaigns linked to North Korea from 2009 onwards.
Six computers located within North Korea are also suspected of accessing South Korean financial institutions' computer systems a staggering 1,590 times since June 28, 2012.
The attacks occurred in late march and caused infected computers cease functioning.
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