A four-member family was killed on Saturday when their car smashed into the back of a parked truck outside the city of Katerini in northern Greece. Police said that a 38-year-old man, his 37-year-old wife and their two children, aged 11 and two, were burned alive when their car caught fire after crashing into the lorry on the main Athens-Thessaloniki highway. It was not immediately clear what caused the unnamed man to drive into the back of the lorry, which had stopped at the side of the highway, officers said. In a separate incident, a bus in Piraeus caused damage to 15 parked cars after its driver suffered a heart attack while behind the wheel. None of the passengers on the bus were injured and the driver was taken to hospital, where doctors said he recovering.