CHANDIGARH: Four labourers from Uttar Pradesh, who were sleeping on the roadside, were killed and 12 others were injured after being run over by a truck in Haryana's Jhajjar district on Thursday, police said. The police said the truck loaded with coal rammed the median divider and turned turtle after the collision, hitting those sleeping at the spot. The accident occurred on the Kundli-Manesar-Palwal expressway near Aasoda toll plaza in Bahadurgarh, they said.