QUETTA - Two people were killed and another injured in two separate incidents of firing that occurred in Mastung and Usta Muhammad on Saturday. In the first incident, unknown armed men riding a motorbike opened indiscriminate firing on Mumtaz and his friend Zahoor Ahmed in Killi Shai of Mastung district, some 40 kilometers from here. As a result, they received critical wounds and rushed to hospital where Mumtaz succumbed to his injuries. The deceased was a mason and belonged to Punjab. Police handed over the body to his heirs after autopsy and started investigations. In the second incident, brother-in-laws allegedly killed their sister-in-law in Usta Muhammad. As per reports reaching here, Mumtaz Ali Gohar and Baha Khan allegedly fired on their sister-in-law with TT Pistol in Saleem colony of Usta Muhammad and later threw her body on Railway track. They escaped from the scene after committing the crime. Police shifted the body to hospital and handed over it to her family after completing legal formalities. Motive behind the killing is stated to be dispute over piece of land. Police has registered a case against accused and are investigating.