An 84-year-old woman and her 12-year-old grandson died in a house fire in Farmington on Tuesday morning. According to Ontario County Sheriff Kevin Henderson crews were called with a report of a fire around 2:45 a.m. Investigators say a man in his 50s was outside and told them his mother and nephew were still inside. The victims are Mary Button, 84, and 12-year-old Conrad Buttons. Crews are investigating the cause of the fire.