A structure fire that occurred in Indiana County on Friday morning has been determined to be arson. The fire broke out around 6:30 on the 8700 block of Route 422 Highway in Cherryhill Township. State police report the structure was empty at the time of the fire, and damage has been estimated to be around $750,000. Reportedly, a similar fire happened on that same property, in a different structure, last October. That building was totaling destroyed. Authorities are asking anyone who may have information to contact the state police barracks in Greensburg.