The vessels manager, a Turkish firm called Advantage Tankers, issued a statement acknowledging the Advantage Sweet was being escorted by the Iranian navy to a port on the basis of an international dispute. All the ships 24 crew members are Indian.While Tehran says the tanker was seized over it running into another Iranian vessel, it has provided no evidence yet to support the claim and the Islamic Republic has taken other ships as bargaining chips in negotiations with the West.The footage showed the commandos descending on the deck of the Advantage Sweet by ropes from a hovering helicopter.