Finland seized an oil tanker that authorities believe might have deliberately cut vital undersea cables. Finnish authorities believe the tanker may be linked to Russia.

A vessel delivering oil for Russia was detained by Finland authorities on Thursday in connection with an undersea cable cutting incident that disconnected electricity to Estonia.

Police in Finland are investigating what they called "grave sabotage" and have taken command of Eagle S, an oil tanker believed to belong to a so-called shadow fleet of ageing tankers which seek to evade Russian sanctions.