At least 11 people were killed and over 50 injured in a series of road accidents across Bangladesh caused by driving in heavy fog, media reports said Sunday, according to dpa. The worst occurred in central Munshiganj district when a crowded bus overshot a culvert and plunged into a ditch killing four passengers and injuring 15, several critically. The local Bengali daily Ittefaq said the bus driver was speeding despite the poor visibility. Another four people died in a head-on collision of two coaches in the northeastern Habiganj district. Thirteen people were injured, the newspaper report said. One person was killed and 12 injured when a truck of the paramilitary border guards collided with a coach near Chittagong overnight. The coach was taking home Moslem pilgrims from Dhaka. A motorcyclist was reported killed when a speeding bus hit him from behind near the town of Gaffargaon in eastern Bangladesh. The media reported the death of another person in a highway accident close to the farming town of Raipura. Ten people were injured in that crash.