Businesses working with Iranian airlines risk US sanctions, Treasury Secretary Scott Bessent has said according to Reuters, calling the warning a part of a campaign to put economic pressure on Tehran during the war.

Iranian state media reported over the weekend that Iran has resumed commercial flights from Tehran’s international airport for the first time since the start of the war.

The US Treasury Department has said Washington is imposing a “financial stranglehold” on the Iranian government.

“Doing business with sanctioned Iranian airlines risks exposure to US sanctions,” Bessent said in a post on X.

“Foreign governments should take all actions necessary to ensure that companies in their jurisdictions do not provide services to those aircraft, including the provision of jet fuel, catering, landing fees or maintenance,” he said.