The incident took place yesterday within the Lonikatra police station limits, they added.
"A neighbour of the five-year-old girl, identified as Mohit (18), on the pretext of dropping her home, took her to a nearby field on his motorcycle and sexually assaulted her. He then dropped the girl at her place, before fleeing," Lonikatra police station in-charge B P Yadav said.
The girl narrated her ordeal to her mother, Yadav said, adding that on the basis of a complaint from the girl's father, a case under section 376, IPC (rape) and the relevant sections of the Protection of Children from Sexual Offences (POCSO) Act was registered against the accused.