Norway 'Pro-Russia cyber actors' took over dam, says spy chief

Russian hackers took control of a Norwegian dam this year, opening a floodgate and allowing water to flow unnoticed for four hours, Norway's intelligence service has said.

- Miranda Bryant

The admission, by Norway's Police Security Service (PST), is the first time that Oslo has formally attributed the cyber-attack in April on Bremanger, western Norway, to Moscow.

The attack on the hydropower dam, which produces electricity, released 500 litres of water a second for four hours until the incident was detected and stopped.

The head of the PST, Beate Gangås, said on Wednesday: "Over the past year, we have seen a change in activity from pro-Russia cyber actors."