Prem Khadka, 19, of Gurwakot Municipality-3 in Surkhet district was arrested for allegedly raping a mentally retarded 18-year-old girl, police said.

The driver of tanker (Ba 1 Kha 6677) raped the girl on Tuesday evening after promising her to take up to her house in the vehicle when the girl was returning to home from the market, according to a complaint lodged by the victim’s family to the Area Police Office, Sakranti Bazaar.

The police said that further investigations into the case are underway while the girl is sent to the District Hospital for health check-up.