Bloomberg reports that Finnish authorities boarded the crude oil tanker named Eagle S. after a 658-megawatt Estlink 2 power interconnector and several data cables were disrupted.

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The Estlink 2 electricity cable connecting Finland and Estonia was disrupted on Christmas Day, sparking concerns of another potential undersea cable sabotage incident in the Baltic region.

The Financial Times reports that Finnish authorities are investigating a crude oil tanker named Eagle S. The tanker flies the Cook Islands flag and is reportedly part of Russia’s so-called “dark fleet.”

Data from the ship-tracking website MarineTraffic shows the vessel slowed down at the time the 658 megawatt (MW) Estlink 2 power interconnector was disrupted. The tanker was transiting the Baltics on its way from St. Petersburg to Egypt.