VIDEO: Firefighters are investigating a fire at a Seattle nightclub early Monday morning. Firefighters responded to the fire around 2:45 a.m. at Trinity nightclub. It's located at the 100 block of Occidental Ave. S in the Pioneer Square area. According to the Seattle Fire Department, the fire is now under control. Fire investigators are investigating this as a possible suspicious fire. No injuries have been reported, but the area could be closed for much of the morning while crews investigate the cause.