Once again, several submarine cables have been damaged in the Baltic Sea, including four data cables and a power connection. One of them has just been repaired.

Police and media reports say that Finnish authorities have detained a Russia-linked ship as they investigate whether it damaged a Baltic Sea power cable and several data cables.

A power cable connecting Finland and Estonia under the Baltic Sea suffered a power outage on Wednesday, prompting an investigation.

Finnish police said on Sunday they had found tracks that drag on for dozens of kilometres along the bottom of the Baltic Sea where a tanker carrying Russian oil is suspected of breaking a power line and four telecoms cables with its anchor.

General Mark Rutte says the military alliance will step up patrols in the Baltic Sea area as Finnish investigators work to establish whether a ship linked to Russia sabotaged undersea cables there this week.

Nato will bolster its military presence in the Baltic Sea after the suspected sabotage of an undersea power cable linking Finland and Estonia this week, the Western military alliance’s chief Mark Rutte said on Friday.