TEHRAN Iranian media said several blasts were heard on Tuesday in the central city of Isfahan, which hosts multiple nuclear facilities, as Israel kept up its strikes for a fifth day. "Several explosions were heard in the east and north of Isfahan and air defences were activated against the hostile targets," the Mehr news agency reported. Air raid sirens in Tel Aviv, north Israel Air raid sirens sounded in the Tel Aviv area and parts of northern Israel, the military said, after warning of a