Underlining Iran's continued control of the Strait of Hormuz, a Botswana-flagged liquified natural gas tanker called the Nidi attempted to travel out of the Persian Gulf via a route ordered by the Revolutionary Guard but suddenly turned around and headed back early Friday, ship-tracking data showed.

On Thursday, four tankers and three bulk carriers crossed through the Strait of Hormuz, bringing the total number of ships passing through since the ceasefire to at least 12, according to the data firm Kpler. However, other ships not transmitting their locations may have passed through as well. The strait typically saw well over 100 ships passing through it daily in peacetime.