Lucknow: A 15-year-old class 10 student was killed and three others seriously injured after a speeding truck hit a cyclist and then rammed into a car in the Juggaur area under BBD police station on Monday evening.Police identified the deceased as Shani Kannaujia, a student of a govt school in Juggaur. He was returning home from school on his bicycle around 4:20pm when the accident occurred. According to eyewitnesses, the truck was moving at high speed when it first hit the cyclist, dragging him several metres. In an attempt to flee, the driver rammed into a car, causing the vehicle to crumple under the impact. Local residents caught the driver before he could escape. Police said that Shani and the injured were rushed to Lohia Hospita, where doctors declared the teenager dead.The injured were identified as Rakesh, truck driver and resident of Barabanki, Sachin Yadav, 20, a law student at a private college, Anand Kannaujia, 21, of BBD and an engineering student at a private college. BBD SHO Ram Singh said Rakesh would be taken into custody after he is discharged from the hospital.