Overview

• PST publicly tied an April 7 valve opening at the Bremanger dam to pro-Russian hackers, marking Oslo’s first official attribution of such critical-infrastructure interference
• The breach released about 500 litres of water per second for four hours without causing injuries or structural damage
• Authorities flagged weak login credentials as the likely entry point, underscoring security gaps in non-power dam operations
• PST director Beate Gangås and intelligence chief Nils Andreas Stensønes warned of escalating hybrid warfare tactics and urged Norwegians to remain vigilant
• Russia’s embassy in Oslo dismissed the allegations as unfounded and politically motivated while Norwegian agencies move to strengthen infrastructure defences