Oil tanker Niovi, sailing under Panamanian flag, captured by Iran in Strait of Hormuz Iranian forces captured a foreign vessel on Wednesday, the second ship to be harassed and seized by the Middle Eastern country in a week, the U.S. Navy said. The Niovi, a commercial oil tanker flying the Panama flag, was passing through the Strait of Hormuz between the Persian Gulf and the Gulf of Oman when it was overtaken by Iran's Islamic Revolutionary Guard Corps Navy (IRGCN)