At least 10 people were killed and 40 injured Sunday in two road accidents in Bangladesh.Seven people were killed and 30 injured when a bus and a truck collided head-on at Comilla district, some 96 km east of Dhaka, Xinhua reported.In a separate accident in Feni district, some 49 km south-east of Dhaka, three passengers were killed and 10 injured when the driver of a bus lost control of the vehicle and crashed into a tree.