Finland's transport agency on Thursday said it was inspecting a tanker suspected of being part of Russia's so-called "shadow fleet", which is believed to have been involved in the breakdown of an undersea cable.

Finnish investigators have linked damage to the Estlink-2 power cable in the Baltic Sea to a Russian-linked vessel, the Eagle S. Anchor drag marks stretching nearly 100 kilometers were discovered, and an investigation is underway to determine intent,

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.

NATO allies met on Dec. 30 to address the security of critical infrastructure in the Baltic Sea, following damage to undersea cables connecting Estonia and Finland several days earlier.

Finnish investigators probing the damage to a Baltic Sea power cable and several data cables said they found an anchor drag mark on the seabed, apparently from a Russia-linked vessel that has already been seized.

Finnish authorities discovered anchor drag marks on the seabed just a day after it moved the Eagle S to a safer anchorage to help further its investigation.

Finnish investigators have uncovered an underwater trail stretching nearly 100 kilometers around the site where a cable was severed on Christmas Day. The ship suspected of carrying out this act of sabotage is named Eagle S and sails under the flag of the Cook Islands.