Finland last month seized the Eagle S tanker carrying Russian oil on suspicion that the vessel had damaged the Finnish-Estonian Estlink 2 power line and four telecoms cables by dragging its anchor across the seabed.

The Swedish navy said Tuesday it had recovered from the Baltic Sea the anchor of an oil tanker suspected of belonging to Russia's "shadow fleet" and damaging four underwater telecoms cables and one power cable on Dec.

The decision follows a spate of suspected sabotage incidents on underwater cables.

Finland’s National Bureau of Investigation said the ‘location where the anchor was found is along the route’ of the seized Eagle S tanker

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 said on Friday it would boost its presence in the Baltic Sea after the suspected sabotage this week of an undersea power cable and four internet cables, while alliance member Estonia launched a naval operation to guard a parallel electricity link.

Finnish police said on Tuesday they had recovered a lost anchor from the seabed as part of an investigation of suspected sabotage against power and internet cables in the Baltic Sea.

NATO will strengthen its presence in the Baltic Sea following the outage of the Estlink 2 submarine power cable, Secretary General Mark Rutte said on Friday after speaking to Finnish President Alexander Stubb.

Finland's Elisa said on Monday that it had finished the repair of its two undersea telecommunications cables that were damaged in the Baltic Sea on Dec. 25. Finland on Dec. 26 seized the Eagle S tanke