RedactedNarrative: I received a call from Cpl. advising me of this accident on Saturday, 8/15/14, at approximately 1800 hrs. He and Officer responded to Beebe Hospital in Lewes Delaware to gather information. Lt. responded to the area to interview the operator of vessel. Lt advised me the Operator left the dock at Pot-Nets Seaside at about 1700 hours with six others on board. They headed for Indian River to go tubing. They arrived in the area of about 1/4 mile south east of White House Beach Development. Operator and Passenger stayed on the boat while two Victims got on a long tube and three passengers got on a flat tube. Operator said he started pulling the tubers around the area at about 15 mph in the channel area when about 1730 hrs. Occupant1, who was sitting in the rear of the boat observing, advised the kids flipped over. It took about 30 seconds to turn around and go back. Occupant1 advised victim1 was floating and not moving. Operator said he and Occupant1 jumped in and flipped victim1 over and he started coughing and spitting up water. Victim2 was alert but said his head hurts. Appears Victims collided when flipping off of long tube. No other injuries reported . Operator drove everyone to shore then to Hospital. I also responded to Pot Nets Seaside and spoke to the Operator confirming information.