Russia’s vast shadow fleet of ships that Moscow is exploiting to skirt restrictions on transporting oil and gas, or carrying stolen Ukrainian grain, was also targeted. Fifty-two vessels were added to a growing list of ships banned from European ports and deprived of services.

The Finnish authorities seized an oil tanker on Thursday on the suspicion that it was involved in cutting vital undersea cables and said the ship might have been part of Russia’s “shadow fleet,” aimed at evading Western sanctions.