The sanctions target three vessels involved in the trade of Iranian petroleum and petrochemicals, which generates billions of dollars for Iran’s leaders, supporting Tehran’s nuclear program, development of ballistic missiles and financing of proxies including Hezbollah, Hamas and the Houthis, the Treasury said.

The vessels targeted were the Djibouti-flagged crude oil tanker MS ENOLA, owned by Journey Investment company, the San Marino-flagged MS ANGIA, and the Panama-flagged MS MELENIA. The last two tankers are managed and operated by Liberia- and Greece-registered Rose Shipping Limited.

The sanctions block all property and interests in the United States of the designated parties, and U.S. persons and entities dealing with them could be exposed to sanctions or enforcement actions including fines.