At least four members of a marriage party were killed on Monday night near here as the bus carrying them overturned after driver lost control over the vehicle, police said.According to district police officials, more than two dozen members of the marriage party received injuries. They have been admitted to the Nalanda Medical College and Hospital here. The incident took place at Gaurichak on the outskirts of Patna.Agitated over the loss of lives, locals set the bus ablaze. The police have lodged a case over the incident.