The US Treasury sanctioned 17 vessels and their owners Thursday under "Operation Economic Outcast", saying the action effectively neutralizes most of Iran’s remaining shadow fleet.

Axar.az reports, citing Iran International, that in a statement, Treasury said the ships had carried millions of barrels of Iranian crude, petroleum products and petrochemicals to markets in South and East Asia. The network spanned more than a dozen jurisdictions and relied on international front companies.

Thursday’s broader Iran-related sanctions targeted six individuals, 27 entities and 22 vessels in total, including the 17 ships highlighted by Treasury. The additional targets included five Indian nationals and a Turkish national, along with companies including India’s Samudra Marine Services and SSPL Solutions and the UAE’s Hessonite Ship Management.

“Treasury is starving the tyrannical regime in Tehran of the money it uses to wage war in the region, and we will continue exposing those who enable the regime’s oil sales,” said Secretary of the Treasury Scott Bessent. “No enabler of Iranian sanctions evasion is safe from the full force of Treasury’s authorities.”

Among the targets were the Cameroon-flagged Shenzhen, which Treasury said had transported more than 3.5 million barrels of Iranian crude since November 2025, and the Vanuatu-flagged Tina 5, which carried more than 1.5 million barrels in August. Designated companies include firms in China, Hong Kong, the Marshall Islands and the British Virgin Islands.