U.S. Navy assisting after apparent oil tanker attack The U.S. Navy says it is assisting after an apparent attack on two tankers in the Middle East. The incident took place overnight near the Strait of Hormuz, the main artery for transporting oil from the Middle East. Pictures released by Iranian state media show smoke billowing from the ships.A U.S. defense official tells CBS News that Iran is "likely" behind the attack. Imtiaz Tyab reports.