North Korea 'stole $2bn via cyber-attacks'

North Korea has stolen $2bn (£1.6bn) to fund its weapons programme using cyber-attacks, a leaked United Nations report says.

The confidential report says Pyongyang has targeted banks and crypto-currency exchanges to collect cash.

Sources confirmed to the BBC that the UN was investigating 35 cyber-attacks.

North Korea launched two missiles on Tuesday, the fourth such launch in less than two weeks.

In a statement on Wednesday, the North's leader Kim Jong-un said the launches were a warning against joint military exercises being carried out by the US and South Korea.

Pyongyang has described the exercises as a violation of peace agreements.