The Italian news agency ANSA says an apparently drunken 19-year-old asylum seeker from Ivory Coast has stabbed a public transit bus driver in the Tuscan city of Siena, causing a serious injury. ANSA said the police, alerted by passengers waiting for the bus at midday Saturday, shot the man in the leg after he turned his attack on them, first heaving a large glass bottle at them and then attacking them with a knife. According to ANSA, the assailant was the last passenger to get off the bus. Following an argument with the driver and in a drunken state, he ran into a nearby house where he has been residing as an asylum seeker to grab a knife. He returned to stab the bus driver three times in the chest, while passengers called police. ANSA said the driver was in serious condition. Police were unable to immediately confirm details of the attack.