Police have arrested the driver of the truck involved in the accident, and his assistant
The 15-year-old boy was arrested and sent to jail by a court on Tuesday, Chatmohar Police Station Sub-Inspector Abdul Majid said.
The girl has been admitted to Pabna General Hospital.
Quoting the alleged victim's family, the police officer told bdnews24.com that the girl had been playing with other children at Jaberpur village of Mathurapur Union on Monday afternoon.
The boy, a neighbour of the girl, lured her into a garden and raped her there, the sub-inspector said.
"The rapist fled when the locals came to the scene after hearing the girl’s cries. Her father informed the police in the evening," he said.
He also said police had found evidence of rape in initial investigations.