Iran activated its air-defence system today morning amid reports of missile and drone strikes by Israel. Israel fired missile at an Iran airport, ABC News reported citing a US official. Local media said that loud explosion was heard at Isfahan.Israel launched a strike against Iran in retaliation for its weekend attack, US media reported.Iran activated its air defense system over several cities, state media reported, after the country’s official broadcaster said explosions were heard near the central city of Isfahan,Several Iranian nuclear sites are located in Isfahan province, including Natanz, centerpiece of Iran’s uranium enrichment program.Though some media reports said that missiles had been fired, Iran said that they have shot down several drones but there had been “no missile attack for now”.