A 13-year-old boy, his sister, 16, a flatmate and a neighbour were injured in a fight over television noise in a Kowloon City flat yesterday. The dispute erupted as the boy and his sister were watching television in a flat at Narcissus House, Ma Tau Wai Estate, at 12.30am. A flatmate, 59, complained and hit the TV with a hammer. The boy called his mother on the mainland. She rang a neighbour, who went to the flat. The men were being questioned by police.