QUETTA: Two persons were killed when tow groups clashed here Sunday.According to details two groups clashed in Killi Bangulzai Qambrnai road here today. Two persons Ghalib and Naseer Ahmed were killed in the clash. In another incident armed men opened fire on Traffic Police Constable near a hotel along Chaman road Kuchlak about 20 Km north of Quetta today. Constable Muhammad Ashraf died on the scene. Armed men fled from there.