More than 40 people have been killed in three car-bomb attacks in Baghdad and at least 76 people were wounded. One bomb went off shortly before 8am local time, the height of rush hour. It was close to an entrance to the Nahda bus station.The second, also on board a coach, exploded inside a few minutes later. Police and medics were among the casualties struck by the third bomb. It happened close to the Kindi hospital, where victims of the other blasts were being taken. The violence ended a lull in insurgent attacks. There is speculation the acts may have been timed to coincide with a resumption of talks among Iraqi leaders over a new constitution. These are currently deadlocked.