The US warned Lebanon on Wednesday against accepting free gifts of fuel from Iran, telling the crisis-hit country that it could be subject to US sanctions if it goes ahead with the importation of Iranian oil. The warning came as Iran accused the US of bombing a convoy of Iranian tankers in Syria carrying fuel to Lebanon. Fifteen people were reportedly killed in the strike. Lebanese media reported that the US had informed Prime Minister Najib Mikati that free gifts of fuel from Iran were subject to US sanctions. A US legal firm told the Lebanese government that the country must apply for a spec…