Sunday's rupture follows a string of incidents that have heightened fears of Russian sabotage and spying in the strategic region. View on euronews

Sweden said Sunday that it seized a vessel suspected of damaging a fiber-optic cable under the Baltic Sea that links the country to Latvia, in what authorities are investigating as an act of "aggravated sabotage.

The Arelion submarine cable, which connects the Swedish island of Gotland to Lithuania, and the C-Lion 1 submarine communications cable that runs between Finland's capital Helsinki and the German city of Rostock were also damaged in mid-November near Sweden's territorial waters.