Seattle Fire officials are investigating after an early morning fire in Seattle's Beacon Hill neighborhood. Firefighters arrived on scene to find the home engulfed in flames. The house was two-stories and had a basement, fire officials said. Firefighters say that when they arrived, the fire had spread to all three floors. Authorities say the house could have been home to a marijuana growing operation. No injuries were reported. Authorities have not determined a cause or if any pot-related activities caused the fire.