An investigation is underway after officials police said an oyster farmer discovered a body on the bank of the Piscataqua River.New Hampshire Marine Patrol said the oyster farmer called 911 around 3:30 p.m. and administered CPR until first responders arrived. Emergency medical service personnel could not revive the man. Officials said the body of the man was found near the Cedar Point Road boat ramp. His name has not yet been released.Anyone with information is asked to call the state police marine patrol.