KARACHI: Two persons were gunned down and other two injured in separate incidents in the city on Tuesday. Two men, Shabbir, 45, son of Bashir, and Nasim, 40, were killed while another man Arshad Naqvi was injured when unidentified gunmen opened fire on them near Super Market in Liaquatabad No 5. The bodies and injured were shifted to Abbasi Shaheed Hospital. A man, Liaquat Ali, 28, was injured in police encounter in Shanti Nagar, Ittehad Town. He was shifted to Civil Hospital Karachi for treatment.