(Newport, OR)  --  Investigators continue to try to find the cause of a motel fire that left four people dead in Newport.  Authorities say the deceased include 51-year-old Tammi Sue Hepner of Portland; 63-year-old Allen Arthur Hepner of Portland; 60-year-old Sandra Sue Shoemaker of Springfield; and 64-year-old Danny Keith Shoemaker of Springfield.  All four perished in the fire at the Newport City Center Motel on the morning of August 5th.