A police official said the incident occurred on the Kirri-Shamozai Road near the Chashma Sugar Mills-II.
He said Shahid Ustrana, a son of the deceased Pir Daad Ustrana, 52, lodged a report mentioning they had a personal enmity with the rival group. He said his father and 16-year-old brother, Arafat Ustrana, were returning home after appearing in a court on a motorcycle, when their opponents hiding in a forest opened fire, killing them on the spot.
The complainant said he was behind the victims riding on another motorcycle, adding the accused managed to escape.
The Paroa police registered a case against accused persons, including Alamgir, Majeed, Samiullah, Alamgir and Akram Ustrana of Mangal area.