CCFD responded on 03/19/2007 at 0538 AM for smoke in the house occupants had evacuated.  Units responding were Eng 404, Eng 402, Medic 480, Utility 435, & Chief 450.  While enroute to the scene Campbell County dispatched advised CCFD that occupants had escaped thru a window and HHPD onscene advised smoke was present outside the building. Upon arrival, found 2 story, single family house, smoke showing from first floor. Mutual Aid was called in from Ft. Thomas FD and Southgate FD to the scene with Alexandria FD moved to our station for stand-by. Crews made entry to first floor through front door into living room. No fire was found on first floor. Crew advised to back out of building to attempt fire attack through basement door. Made entry to basement and extinguished existing fire. Second attack line into first floor to attack fire now showing in bedroom on first floor. Gas was found leaking from exterior wall (elbow on A & D corner) gas was shut off at meter in the residence and gas company ordered to shut off at street. Sweep of residence reveled no more visible fire and command declared under control. Overhaul of upper floors, with investigation taking place.  Several articles from the home was salvaged and given back to the residents.  American Red Cross assisted the residents with housing until the house was repaired.  No one was injured at the fire.  Estimated loss of $60,000.