The Treasury Department on Friday warned U.S. shippers that they could face sanctions if they have been found paying Iranian tolls to gain access through the Strait of Hormuz. The department’s Office of Foreign Assets Control (OFAC) released an advisory stating the U.S. is aware of Iranian demands for shipping vessels to pay tolls to ensure safe passage. “U.S. persons and U.S.-owned or -controlled foreign entities are generally prohibited under U.S. sanctions from engaging in transactions with the Government of Iran, including the provision or receipt of services, unless exempt or authorized by OFAC,” the advisory reads. The OFAC did not specify whether any companies have made any indirect payments toward Iran, though some ships have paid up to $2 million in toll fees to Tehran since the U.S.-Israeli conflict in Iran began on Feb. 28.…