The first vessel has crossed the Strait of Hormuz after the US imposed a military blockade of Iran's ports.
The development was reported by BBC News and is being monitored by FastNewsHQ's global intelligence team.
Authorities are expected to issue further statements in due course.
FastNewsHQ will update this report as verified information becomes available from primary sources.
Four vessels with links to Iran have crossed the Strait of Hormuz despite the start of a US naval blockade, but two of those vessels appear to have reversed course.
The wider implications are still developing, with further official statements and on-the-ground reporting likely to add detail.
FastNewsHQ will update this story as more confirmed information emerges from primary reporting and trusted public sources.
