At least three Iranian oil tankers carrying roughly five million barrels of oil have passed through what was previously the U.S. blockade line following President Donald Trump’s announcement of a ceasefire agreement with Tehran on Sunday, according to ship tracking data.

Tracking services Kpler and Vortexa reported that two very large crude carriers (VLCCs), Hero II and Diona, each transporting approximately two million barrels of Iranian oil, completed transit through the Gulf of Oman on Wednesday and are now headed toward destinations in Asia.

A third vessel, the smaller tanker Sonia I, also crossed the former blockade line and is reportedly en route to Singapore.

All three ships are owned by the National Iranian Tanker Company, which was sanctioned by the U.S. Treasury Department in October 2020 over allegations that it generated revenue benefiting Iran’s Islamic Revolutionary Guard Corps (IRGC), an organization designated by the United States as a terrorist group.

The movement of the tankers comes as attention remains focused on how the ceasefire arrangement could affect regional trade, shipping routes, and economic activity tied to Iran.

Supporters of diplomatic efforts often point to reduced tensions and restored commercial movement as signs of progress, while critics continue watching closely for how enforcement and long-term conditions develop. International agreements always look simple in headlines — implementation tends to be where the real debate begins.

For now, the passage of the tankers marks one of the first visible developments following the ceasefire announcement, with broader implications still unfolding.