March 2 (UPI) -- Belgium has seized a Russian oil tanker believed to be part of a shadow fleet of vessels the Kremlin uses to sell its energy products blocked by sanctions, Belgium's defense minister said. The armed forces of the European nation, with the support of French navy helicopters, boarded the oil tanker in the North Sea over the weekend, Defense Minister Theo Francken said in a statement . The vessel was being escorted to the Belgian port city of Zeebrugge where it would be seized by