A father committed suicide after killing his two children over domestic issues in Model Colony here in Sargodha on Friday, Police said. Tariq early morning opened fire on his minor children, identified as Aina , 09, and Hasan, 08, over domestic issues. As a result, both the children died on the spot while the accused also committed suicide after killing his children. According to initial investigation of police, Tariq had two wives and the incident took place due to constant domestic clashes. Police registered case and started investigation.