Two girls were allegedly sexually assaulted by their father at a village in Mathura, following which their grandfather lodged a complaint on Friday, the police said.
The sisters mustered courage and informed their grandfather, who lodged a complaint at the Naujheel Police Station, they said.
The girls have been sent for medical examination, the police said, adding the accused has been arrested.
According to the FIR, the accused first raped his 14-year-old daughter and then the elder one, who is 17, in the past two and a half years, the police said.
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