The Tri-State Fire District was called at 0506 hours on June 5th for a Structure Fire. Companies arrived to 5646 Bentley Avenue to find a single family structure, with Heavy Smoke. Fire Crews made an interior attack and conducted a primary search confirming that there was no life threat. The fire was located in the basement. Four occupants were home at the time, one of which was transported to Hinsdale Hospital for smoke related injuries. The family pet did not survive the incident. The fire is currently under investigation but deemed non suspicious with a $125,000 dollar loss estimated. No more information is available at this time.