A British-flagged oil tanker is leaving Iran, after being held for more than two months. The Stena Impero's Swedish owner, Stena Bulk, said it was on the move from the Bandar Abbas port, where it has been anchored since July. The vessel was seized by Iranian troops in the Strait of Hormuz after they accused it of breaking maritime rules. Officials say it left for international waters at 09:00 local time (05:30 GMT) on Friday morning. Erik Hanell, CEO of Stena Bulk, said the vessel would head to Dubai, where the crew would be debriefed and receive medical checks. "The families of crew members have been informed and the Company is currently making arrangements for the repatriation of its valued seafarers at the earliest possible opportunity," he said in a statement. The tanker's seizure, on 19 July, came two weeks after an Iranian tanker was held off Gibraltar with the help of the UK Royal Marines. That ship was suspected of violating EU sanctions on Syria, but was released in August. The operation against the Stena Impero was seen as retaliation for Britain's role in helping to seize the Iranian vessel, a link Tehran denied.