CHENNAI: An attempt to take a selfie in front of an approaching suburban train cost a teenager his life in Chennai on Sunday evening.Police said S Dinesh Kumar, a Class 11 at the Arignar Anna Government School in Poonamallee, visited the Vandalur zoo with his seven friends on Sunday.After visiting the zoo, Dinesh and his friends went to the Vandalur railway station around 5pm. While they were walking on the tracks towards the station, Dinesh told his friends that he wanted to take a selfie in front of an approaching train.He stood on the track taking selfies while a Chennai Beach-Chengalpet suburban train was fast approaching. However, he apparently miscalculated the speed of the train and could not clear off the track in time. He was run over by the train.Train’s engine driver informed Vandalur railway station master Venkat Raman about the accident. Based on the station master’s complaint, the Tambaram railway police registered a case and sent the body to the Government Hospital in Chromepet for autopsy.Dinesh’s father, Sugumar, was working at a private courier office in Poonamallee, police said.