Nine people were injured overnight when an Airbus A-340-600 passenger plane of the Spanish airline Iberia made an emergency landing in Lisbon, airport sources said Friday in the Portuguese capital. The plane carrying 288 passengers and 14 crew was en route from Madrid to Mexico when pilots noticed smoke in the cabin. The plane made an emergency landing at the nearest airport, which was Lisbon. Eight passengers sustained slight injuries and one broke a leg during evacuation through emergency chutes. The airport remained closed for three hours, delaying the departure for Brazil of Russian President Vladimir Putin, who was transiting through Lisbon, by an hour and a half, reports said in Lisbon and Madrid. The cause of the smoke which prompted the emergency landing was not immediately known.