The U.S. is imposing sanctions on firms and entities accused of being involved in the transfer of Iranian drones to Russia for use in Vladimir Putin’s ongoing invasion of Ukraine. The penalties and diplomatic restrictions come as part of the most recent effort by the United States to disrupt Russia’s military supply chain and procurement network. They also cut at the growing relationship between Russia and Iran, two politically and economically isolated nations. The Treasury Department is sanctioning a company that the U.S. says designs and produces drones used by Russian forces in Ukraine as well as several firms that are said to facilitate the transfer of Iranian drones to Russia.