Iran has added more ships to it deems non-compliant and subject to fines, confiscation or detention if they try to sail through the Strait of Hormuz to its blacklist, Reuters reports citing a government website.

In an update on the Persian Gulf Strait Authority (PGSA) website, 11 more ships have been added — with the total of blacklisted vessels listed as 56. Shipping industry sources say the update was made in the past 24 hours.

Iranian officials have not responded to a request for comment.

The restricted list includes very large crude carriers, liquefied natural gas and liquefied petroleum gas tankers, and clean product vessels, among others.

“Any vessel cooperating with listed vessels (via STS oil transfers, transshipment) will be added to the list,” the PGSA says on its website. “To request removal, vessels must submit a formal application with justifications.”