A house caught fire Thursday night in the 1600 block of N. Ruby near the Ruby and Mission intersection. The fire was called in around 8:30 p.m. Thursday when a woman who lives at the home returned to the house and heard the smoke detector going off. She then saw the flames inside the home and flagged someone down to call 911. No one was inside the home at the time. The Fire closed down Ruby at Mission for several hours Thursday night. Firefighters are still determining the cause of the fire. View image on Twitter