Iran’s paramilitary Revolutionary Guard says it has seized two Greek oil tankers in the Persian Gulf. The Guard’s statement on Friday night said the ships were seized over unspecified violations. It did not elaborate. The US Navy’s Mideast-based 5th Fleet had said it was investigating earlier reports that Iran seized two Greek tankers. Iran had threatened to take “punitive action” earlier Friday over Athens being involved in the US seizure of an Iranian oil tanker in Greek waters. The US Navy’s Mideast-based 5th Fleet said Friday it was “looking into” reports that Iran had seized two Greek oil…