A police constable was killed and four others were injured when a pickup van rammed into a tree at Bochaganj in Dinajpur.The deceased is Abdul Latif, hailing from Gaibandha.Dinajpur Police Superintendent Ruhul Amin confirmed the matter to the journalist.He said, the pickup van rammed into a roadside tree when it driver lost his control over the steering around 3am Monday. Abdul died on the spot.