North Korea training ‘cyber warrior’ cell

Despite its poverty and isolation, North Korea has poured resources into a sophisticated cyber-warfare cell called Bureau 121, defectors from the secretive state said.

The news comes as Pyongyang came under the microscope for a crippling hack into computers at Sony Pictures Entertainment.

A North Korean diplomat has denied Pyongyang was behind the attack that was launched last month but a US national security source said it was a suspect.