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.

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,

The U.S. Treasury said on Thursday it is imposing new sanctions on individuals and tankers helping to ship millions of barrels of Iranian crude oil per year to China. The move comes after U.S. President Donald Trump earlier this week vowed to bring Iran's oil exports to zero as the U.