A mother strangled two sons, aged 7 and 5, and buried them in the courtyard of her house in Shujaabad, Multan, a private TV channel reported on Monday. According to the channel, the woman, Aasia, had frequent domestic disputes with her husband, a laborer, who worked in Karachi. Police were told that the mother killed her sons in frustration. Investigations into the case are underway.The channel quoted the residents of the area as saying that both boys had been missing since morning.