France has seized a car cargo ship in the English Channel that the United States says was linked to the son of a former Russian spy chief, in one of the first visible displays of the West enforcing sanctions on Russia for its Ukraine invasion.

The US Department of the Treasury has issued blocking sanctions against the vessel, which it said is owned by a subsidiary of Russian lender Promsvyazbank, one of the Russian entities hit by Washington’s sanctions.

The bank’s CEO, Pyotr Fradkov, is the son of Mikhail Fradkov, a former head of Russia’s foreign intelligence service, who also served as prime minister under Russian President Vladimir Putin. Pyotr Fradkov was himself included in the latest round of US sanctions.