Iran called Friday for the release of a Russian-flagged tanker seized by Greece, saying the transfer of its Iranian cargo to the US was a “clear violation” of international law. Athens confirmed on Wednesday it will send 115,000 tonnes of Iranian oil from the tanker Pegas to the United States at the request of the US Treasury which overseas the enforcement of sanctions on Iran. Iran’s foreign ministry summoned the Swiss charge d’affaires, whose country has handled US interests in Iran ever since ties were cut between Tehran and Washington following the 1979 Islamic revolution. The ministry pro…