ROLPA, Nov 11: A mentally unstable man murdered his daughter and two granddaughters on Friday night. Lil Bahadur Pun, 43, of Gorbot Dhapa in Rolpa municipality-7 has been arrested on the charge of murdering his 25-year-old daughter Pewawati KC and her two daughters aged two years and seven months. Police officer reported that Pun was mentally disorder.