Two firefighters wounded by a gunman who set his upstate New York house ablaze and killed two of their colleagues in an ambush with weapons he wasn't allowed to own were on the mend Wednesday and said they were thankful for the support they've received.

Investigators, meanwhile, traced the gunman's weapons and tried to confirm a body found in his destroyed house was his sister's.

West Webster volunteer firefighters Joseph Hofstetter and Theodore Scardino, who had been in guarded condition, were being upgraded to satisfactory condition on Wednesday at Rochester's Strong Memorial Hospital, which released a statement from them saying they were "humbled and a bit overwhelmed by the outpouring of well wishes for us and our families."