GUJRANWALA:-A man allegedly hammered to death his wife over domestic issue here at Hashmi Colony on Monday. According to police sources, Tariq had a quarrel with his wife Razia over some domestic issue. During the quarrel, he hit head of his wife with a hammer when she was busy cooking in kitchen. Resultantly Razia died on the spot. Razia was mother of seven children. The police have started investigation.