The U.S. on Thursday imposed sanctions on a network of more than a dozen people and firms that are accused of facilitating the shipment of millions of barrels of Iranian oil to China.

The sanctions target entities and individuals in China, India and the United Arab Emirates, as well as several vessels.

According to the state department, the sanctions target a network that is bringing “illicit revenue to the Iranian military” through a front company, Sepehr Energy. Also included are a shadow tanker fleet and management companies that facilitate the supply of oil to China,