Lahore- Three persons including two sisters were killed and two others were injured in different rain related accidents in Lahore. According to the rescue sources, two sisters lost their lives when the roof of their fragile quarter came down in Singhpora area of Lahore due to heavy rain last night. On the other hand, a man was killed when one of the walls of his house collapsed in Badami Bagh area of Lahore last night. Two others also sustained injuries in the incident who were shifted to a nearby hospital for treatment.