A highway near the source of an explosion at the Shahid Rajaee port dock southwest of Bandar Abbas in the Iranian province of Hormozgan. Photograph: Mohammad Rasole Moradi /Getty Images A massive explosion and fire rocked a port in southern Iran purportedly linked to a shipment of a chemical ingredient used to make missile propellant, killing five people and injuring more than 700 others. The blast at the Shahid Rajaei port happened as Iran and the United States met on Saturday in Oman for the third round of negotiations over Tehran’s rapidly advancing nuclear programme. While no one in Iran...