GUJRANWALA : Two brothers shot dead their parents and two sisters over a land dispute on Monday. Riasat Ali, his wife Hafeeza, daughters Qamer and Munawara were in their house early Monday morning. Riasat’s two sons along with their accomplices entered the house and opened fire on them. Resultantly Riasat, his wife and one daughter died on the spot. Munawara was taken to hospital in critical condition but doctors could not save her. Police have started investigation after registering a case.