Nine people were killed and 50 were injured when three buses collided in eastern Bangladesh Monday, a report said. Two of the buses collided head-on in Comilla district on the main highway between the capital, Dhaka, and the south-eastern port city of Chittagong, the private UNB agency said. A short time later, the third bus ran into the back of the crashed Dhaka-bound bus, the agency said. Three of the injured were in a critical condition.