The victim Parmod Kumar, 35, was working in his shop at Nabha chowk, Amloh when he was shot dead by his uncle identified as Om Parkash with his gun, the police said.
Kumar died on way to the hospital, they said.
DSP, Amloh, Manpreet Singh said that Om Parkash has been arrested and his gun has also been taken into possession.
Om Parkash, 70, was allegedly in an inebriated condition when he shot dead his nephew, the police said.