Karachi- At least two persons, including a policeman, were killed in violence in two separate areas of the city on Saturday. According to reports, the policeman, Yousuf, was shot dead by unidentified gunmen at M.A.Jinnah Road of the city. He was appointed at Garden Headquarters. In another incident of firing that took place near Malir, Jinnah Square, a man was killed. Two passengers were killed in a road accident that occurred at Super Highway. Three others were also injured in the accident.