(Fairview, OR)  --  Officials say fireworks may be to blame for a fire that destroyed a Fairview home.  Fire officials say witnesses told investigators they saw neighbors shooting off fireworks the night before the blaze erupted at Fairview Crossing last week.  Officials say any evidence of fireworks likely would have been destroyed in the fire.  One man was injured in the fire that gutted a mobile home at 20637 Northeast Sandy Boulevard last Tuesday.