Finnish police believe the Eagle S may have caused the damage to undersea cables the previous day by dragging its anchor along the seabed.
“The police begin an operation to transfer the Eagle S tanker from the Gulf of Finland to Svartbeck, an inner anchorage near the port of Kilpilahti,” the Helsinki police department said in a statement on Saturday.
This would be a better place to carry out investigations, it added.
Finland’s customs service believes the ship is part of a “shadow fleet” of ageing tankers being used to evade sanctions on the sale of Russian oil.
The Kremlin said on Friday that Finland’s seizure of the ship was of little concern to it. In the past, Russia has denied involvement in any of the Baltic infrastructure incidents.