Three persons were killed and 46 others injured when a bus carrying people to Amarkantak in Madhya Pradesh overturned in Dindori district early on Monday, the state police said.The accident occurred near Ramnagar village when the bus driver lost control over the vehicle.The victims were on their way to take part in the concluding function of ‘Namami Devi Narmade Sewa Yatra' which Prime Minister Narendra Modi is slated to attend later during the day.Six of the injured are said to be critical.