good evening. the un secretary—general and other world leaders have called for restraint in the middle east, after what's believed to have been an israeli attack on iran overnight. us officials say israel was responsible for a missile strike. the israeli government hasn't officially commented. iran says the attack didn't cause any damage and indicated there would be no retaliation. there were reports of explosions in syria, iraq, and most significantly in iran, in the province of isfahan, in the middle of the country. the area is home to an airbase and several nuclear sites, as well as a missile factory. us officials called it an israeli missile strike. iranian media said three small drones were involved. in a moment we'll hear from our north america editor