The United States has announced financial sanctions on an international network that supplies Iranian oil to China. The US Treasury Department revealed this in a statement on Thursday.

This is the first sanction of its kind under President Donald Trump’s administration. According to the statement, the targeted network is responsible for moving millions of barrels of Iranian crude oil, worth hundreds of millions of dollars, to China. The US claims that this oil trade helps fund Tehran’s military operations.

These sanctions are part of the US government’s effort to limit Iran’s oil exports and reduce its financial support for military activities.