Four people died and 44 were injured today when a double-decker bus traveling through thick fog overturned in central Chile, police said. The accident occurred in the town of Ovalle in the Coquimbo region, when the vehicle flipped onto its left side on a slope. "Police confirmed that four people died and others were hurt to varying degrees," said Turbus, the company which owned the vehicle. The injured were taken to hospitals in the cities of La Serena and Ovalle. Police have launched an investigation into the cause of the accident.