[TEHERAN] The British-flagged oil tanker Stena Impero, which had been held off the Iranian port of Bandar Abbas for more than two months, set sail Friday and reached international waters, the provincial maritime organisation and its owner said.
The ship's seizure was widely seen as a tit-for-tat move after authorities in the British overseas territory of Gibraltar detained an Iranian tanker on suspicion it was shipping oil to Syria in breach of EU sanctions.
Teheran repeatedly denied the cases were related but a Gibraltar court last month ordered the Iranian tanker's release despite an 11th-hour US legal bid to keep it in detention.
"The Stena Impero started sailing from the mooring towards the Persian Gulf's international waters as of 9.00 am (0530 GMT) today," Hormozgan province's maritime organisation said on its website.
"Despite the vessel's clearance, its legal case is still open in Iran's courts," the organisation said.
The tanker's captain and crew have "given a written, official statement that they have no claims," it added.
The CEO of Stena Bulk, the Swedish company that owns the vessel, said it had reached international waters at around 0945 GMT and was headed for Dubai.
Erik Hanell told AFP it was "obviously a relief" and added that the priority now was the crew.
"When we reach Dubai we will firstly take care of the crew and then try and get the ship in operational order again," he said.
Iran's Revolutionary Guards seized the vessel in the Strait of Hormuz on July 19 after surrounding it with attack boats and rappelling onto its deck.
It was impounded off the port of Bandar Abbas for allegedly failing to respond to distress calls and turning off its transponder after hitting a fishing boat.
Seven of its 23 crew members were released on September 4.
British Foreign Secretary Domini Raab said the tanker was "unlawfully seized by Iran" as part of its attempts to "disrupt freedom of navigation."
"We are working with our international partners to protect shipping and uphold the international rule of law," he added.
Tensions have risen in the Gulf since May last year when President Donald Trump unilaterally abandoned a 2015 nuclear deal between major powers and Iran and began reimposing crippling sanctions in a campaign of "maximum pressure".
They flared again this May when Iran began reducing its own commitments under the deal and the US deployed military assets to the region.
Since then, ships have been attacked, drones downed and oil tankers seized.
In June, US President Donald Trump called off air strikes against Iran at the last minute after the Islamic republic's forces shot down a US drone.
This month, twin attacks on Saudi oil infrastructure, which knocked out half the kingdom's production, drew accusations of blame not only from Washington, but also from its European allies.
Teheran has denied any involvement in the attacks which were claimed by Iran-backed rebels fighting a Saudi-led coalition in Yemen.
The US has since formed a coalition with its allies Australia, Bahrain, Britain, Saudi Arabia and the United Arab Emirates to escort commercial shipping in the Gulf.
Teheran has warned that the planned US-led International Maritime Security Construct will cause more, not less instability and has proposed a rival security plan of its own.
Speaking at UN General Assembly in New York, President Hassan Rouhani announced a plan called "Hormuz Peace Endeavour" or "HOPE".
He gave no details but called on all of Iran's Gulf neighbours to join, saying: "Security cannot be provided with American weapons and intervention."
Foreign Minister Mohammad Javad Zarif tweeted Thursday that the plan entails "dialogue, confidence-building, freedom of navigation, energy security, non-aggression, non-intervention."