A 32-year-old government employee has been arrested for shooting dead three of his family members, including two minors, after an argument, police said Monday

Daanpal Rathi, who is attached with the sub-divisional magistrate's (SDM) office, late Sunday shot dead his widowed sister-in-law Babita, 33, and her two sons Vipul, 14, and Vikrant, 9, with his licensed revolver in Mansoorpur area.