Yogendra (15), Gautam (15) Pankaj (14) were walking on the rail track near Maghera crossing and could not spot the train moving towards Delhi due to the cover of fog which had engulfed the district, according to police.
All three were residents of Jatav mohalla of Jait village.
After the inquest report, the bodies were handed over to the family members, they said.
Meanwhile, a nurse was killed after being hit by a car coming from Agra while she was waiting for a bus.
"The driver of the car has been arrested," police said.