South Korea is ‘almost 100 per cent certain’ that North Korean hackers have stolen the blueprints for their warships and submarines.

The despotic regime is thought to have taken the documents after hacking into Daewoo Shipbuilding & Marine Engineering Co Ltd’s database in April last year.

North Korea has often been implicated in cyber attacks in South Korea and elsewhere but Pyongyang has either ignored or denied accusations of hacking.

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