Traffic through the Strait of Hormuz remained limited over the last 24 hours, with only 12 ships passing through the strategic waterway as uncertainty continued over talks.
Iran has maintained tight control over transit, according to reports citing shipping data and Iranian state media.
NBC News reported that only 12 vessels passed through the strait in the past day, while shipping tracker Marine Traffic said four of them were sailing under the Iranian flag and that most of the ships used an Iranian-approved route off Bandar Abbas.
Traffic through the crucial waterway remained low, according to the report.
Marine Traffic data also showed that 12 vessels were still anchoring or sailing in the area.
Most of the ships that passed through the strait did so via the Iranian-approved route near Bandar Abbas, the report said.
Iranian state media said new video from the Strait of Hormuz showed ships transiting the waterway with Tehran's permission and under strict Iranian control.
Video posted to Telegram by Iran's Fars News Agency showed ships passing through the Strait of Hormuz after obtaining permission from Tehran to transit into the Persian Gulf.
Fars described the strait as having been returned to what it called a wartime footing.
According to the report, Iran choked off traffic through the strait during its war with the U.S. and Israel, with the effects being felt globally.
The strait was briefly reopened during the U.S.-Iran ceasefire, but was later shut again, leaving vessels trying to pass through and the global economy under pressure.
A senior Iranian lawmaker and former Islamic Revolutionary Guard Corps commander who heads parliament's National Security and Foreign Policy Committee told the BBC in Tehran that Iran would "never" give up control of the Strait of Hormuz.
He described the waterway as "one of our assets to face the enemy."
The lawmaker also said legislation was being introduced in parliament to formally enshrine Iran's authority over the strait.