Russian hackers seized control of Norwegian dam, spy chief says

‘We have seen a change in activity from pro-Russian cyber actors,’ said Beate Gangås, the head of the Norwegian Police Security Service. Photograph: Fredrik Varfjell/AP

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.

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