President Trump’s administration is imposing sanctions on four Venezuelan governors involved in barring humanitarian aid from the country, the Treasury Department announced Monday. All four are supporters of Nicolas Maduro, the dictator clinging to power after dozens of countries declared opposition leader Juan Guaido Venezuela’s interim president.

“The illegitimate Maduro regime’s attempts to blockade international aid intended for the Venezuelan people are shameful,” Treasury Secretary Steven Mnuchin said Monday. “Treasury is targeting four state governors aligned with former President Maduro for standing in the way of severely needed humanitarian assistance and prolonging the suffering of the Venezuelan people.”