Iran tight-lipped on cause of deadly port explosion amid reports of possible presence of chemicals used to fuel missiles

Iranian authorities have not said what caused the massive explosion at the port of Bandar Abbas on Saturday, killing at least 28 people, but video footage and unconfirmed reports point to the possible presence of a chemical used to make missile propellant.

​ Iranian authorities have not said what caused the massive explosion at the port of Bandar Abbas on Saturday, killing at least 28 people, but video footage and unconfirmed reports point to the possible presence of a chemical used to make missile propellant. Read More Breaking News, Latest News and Videos | CNN