The girls, aged 20 and 23, were allegedly abducted on July 10 when they were returning from their college in Delhi Gate locality here, police said.
Their father had filed a case of kidnapping with the police the same day.
The girls were recovered yesterday in a semi-conscious condition in Hatras, police said.
The family of the sisters yesterday told the police that the two girls had been drugged and gangraped by their abductors, who are still at large, they said.
"They will undergo a medical test later," he added.
The matter is under investigation and no arrests have been made so far.
