Iran’s state media reported explosions in the central province of Isfahan Friday, as US media quoted officials saying Israel had carried out retaliatory strikes on its arch-rival. Air defence systems over several Iranian cities were activated, state media reported, after the country’s official broadcaster said explosions were heard near the city of Isfahan. Israel had previously warned it would hit back after Iran fired hundreds of missiles and drones at Israel over the weekend. Most of them were intercepted. Iran’s Fars news agency reported “three explosions” were heard near Qahjavarestan, ne…