Finnish police on Saturday moved a ship held over suspicions it sabotaged an undersea power cable between Finland and Estonia to help with their investigations. Since Thursday, Finnish authorities have been investigating the Eagle S tanker,

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 lines.

The Nordic country's National Bureau of Investigation says the ship is suspected of towing an anchor that caused damage to a source of electricity powering Estonia.