RedactedNarrative: Officers responded to a report of a boat fire on september 14, 2015 at hinckley boat yard in portsmouth, ri.  When officers arrived at the scene they were told that there were 3 boats involved; two of which had sunk.   None of the boats were occupied and all three were tied to the dock.   The boats involved were:  a 60ft sailboat (serengeti), a 34ft. Powerboat (third wish), and a 38ft sailboat (robin too).  The state fire marshal responded to the scene as well as portsmouth police detectives who will be investigating the case. As of december 12, 2015 the fire marshall has not determined a cause of the fire however he is concentrating on the shore power as a possible source . All three vessels were total losses.