Four people, including the driver, were killed and 11 others injured when a speeding sleeper bus travelling from Kanpur to Indore crashed into the wall of a bridge in Madhya Pradesh's Rajgarh district on Friday morning, police said. 

The accident occurred around 8.30 a.m. on the Bhopal bypass bridge in Biaora when the bus lost control while negotiating a curve and rammed into the bridge wall, Rajgarh Superintendent of Police (SP), Amit Tolani said.