North Korean cyber-attacks have stolen millions of dollars worth of cryptocurrency to fund the country's missile programmes, a UN report briefed to media says. Between 2020 and mid-2021 cyber-attackers stole more than $50m (£37m) of digital assets, investigators found. Such attacks are an "important revenue source" for Pyongyang's nuclear and ballistic missile programme, they said. The findings were reportedly handed to the UN's sanctions committee on Friday.