Three brothers were killed and three others injured during an exchange of fire between rival groups in Badami Bagh area of Lahore on Tuesday. According to police, the members of two groups-Amir But and Khalid Khan-had a petty quarrel1 after which they exchanged gun shots in Badami Bagh area. Six persons were injured in the exchange of fire that were rushed to hospital for treatment while three brothers identified as Bablo, Bilal and Pappo succumbed to their injuries. Police have registered a case and initiated investigation into the incident.