SUKKUR: A man was killed while his wife sustained bullet injuries in an attack by a police constable in Khairpur on Thursday. Police said the couple Mir Muhammad Qureshi and his wife Irshad Khatoon were on the way to city for some medical assistance, when Constable Nadeem Sial fired upon them and fled. Qureshi was killed and his wife sustained multiple bullet injuries. People shifted the injured woman and the body to hospital. The A-Section Police said the reason behind the incident was being investigated. Rumour, however, prevailed that the accused cop used to force the woman to develop illicit relations with him and had visited her house many times but she kept declining. Her refusal had angered him and he attacked on the couple.