VIDEO: Investigators are working to find the cause of a fire at an Omaha pub Monday morning. 6 News crews were near 144th and Pacific just before 6 a.m. when they spotted smoke coming the Rusty Nail Pub. Our crews alerted 911. Firefighters arrived on scene and found light smoke inside the bar and small fire in the kitchen. Firefighters extinguished the flames and ventilated the building. Officials said no injuries were reported. The cause of the fire remains under investigation.