German police and customs officers inspected numerous residences in southern Germany belonging to a Russian person on Thursday in connection with assets that are subject to European Union sanctions, according to customs officials.

Reuters was informed by a source with knowledge of the situation that the operation’s target was Russian oligarch Alisher Usmanov.

A legal representative for Usmanov, a Russian-Uzbek businessman who was sanctioned in the wake of Russia’s invasion of Ukraine on Feb. 24, had no immediate comment when contacted by Reuters.

A special commission dubbed “Matryoshka”, set up by the German customs authority’s sanctions office, said in a statement that officers searched properties in greater Munich and Tegernsee in Bavaria.

In September 2022, German police searched Usmanov’s villa in the upmarket holiday town of Rottach-Egern on the shores of the Tegernsee. A court later deemed the raids unlawful.

The German customs authority’s special commission said it was acting on court search warrants. It said it could not give further details on the operation for tactical reasons.