The US Treasury Department has imposed sanctions on three Iranian foreign exchange companies, accusing them of helping convert Iran’s oil revenues into currencies more accessible to the military and affiliated groups, The Caspian Post reports, citing Al Jazeera.

The sanctioned entities are Opal Exchange, Radin Exchange and Tahayyori Guarantee Society, along with their associates.

Treasury Secretary Scott Bessent said Washington would “relentlessly target” Iran’s ability to generate, transfer and repatriate funds.