Fort Wayne fire investigators have determined that an early morning house fire on Monroe Street was intentional. So far no arrests or charges have been filed, but according to fire officials, the investigation is still ongoing. The blaze erupted just after 3:30 a.m., Sunday morning. Once firefighters arrived on the scene, they found heavy smoke and fire coming from three sides of the house. They had it under control in less than an hour. No one was home at the time of the incident and no injuries were reported, but the home suffered heavy smoke, water, and fire damage.