The released British oil tanker, the Stena Impero, has left Iran's Bandar Abbas port to international waters on Friday morning local time, the Ports and Shipping Office of Iran's southern Hormozgan province announced, according to official IRNA news agency.

Iran detained the Stena Impero on July 19, alleging that it had "violated" the maritime regulations while passing through the Strait of Hormuz.

Iran had already released seven crew members of the oil tanker.

xinhua