Two undersea telecommunications cables that were damaged in the Baltic Sea on Dec. 25 appeared to have been torn apart by a strong external force, Finland's Elisa said on Monday, adding that they had now been repaired.

The Finnish operator of the cables suspected to have been damaged by a vessel from Russia's shadow fleet on Christmas Day says the cables have now been repaired. A power cable damaged that day is still out of service.

Finnish authorities have seized a ship carrying Russian oil in the Baltic Sea on suspicion it broke undersea power and internet cables connecting Finland and Estonia.