VIDEO: No one was hurt after a large fire broke out at a northern Nevada brothel Thursday afternoon. The Central Lyon County Fire Protection District said people reported seeing heavy smoke coming from the Kit Kat Ranch in Mound House just after 6 p.m. on Sept. 14. Responding crews found the building heavily engulfed in flames and fire quickly spreading to the ceilings. The building has false ceilings which led to fire spreading to the attic and through the HVAC system. Authorities said nine people were working at the Kit Kat Ranch when the fire broke out but were all able to get out quickly. No customers were at the brothel during the fire. The cause of the blaze remains under investigation and officials will be back out at the brothel on Friday morning working to determine what sparked the fire.