What happened

Pro-Russian cyber actors manipulated operational controls at the small Tureby–Alkestrup drinking-water utility, changing network pressure and causing pipes to burst. Denmark's cyber-security authority reported that about 450 households briefly lost water because of low pressure and around 50 were without water for several hours after increased pressure ruptured a pipe. In December 2025, Denmark's Defence Intelligence Service attributed the destructive attack to Z-Pentest, assessed the group as linked to the Russian state, and described it as an instrument of Russia's hybrid campaign against Western countries supporting Ukraine. The marker is approximate.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.