A coach has plunged off a flyover in southern Italy leaving at least 38 people dead in the country's worst road accident for decades. The coach hit several vehicles before smashing through a barrier and toppling down a steep slope near the town of Avellino, in the Campania region. At least 10 people were injured, some of them seriously. The coach was taking about 50 people, including children, back to Naples following a pilgrimage. The cause of the accident is not yet known. Some reports say the vehicle was travelling at high speed.