A boat belonging to two missing 14-year-old teens was found overturned on Sunday, the U.S. Coast Guard said. The 19-foot white single-engine boat was discovered 67 nautical miles off the coast near Daytona Beach, according to Coast Guard Petty Officer Stephen Lehmann. There was no sign of either teen. Austin Stephanos and Perry Cohen were last seen buying fuel near Jupiter, Florida, on Friday. The families of both boys have offered a $100,000 reward for their safe return while NFL Hall of Famer Joe Namath, a neighbor of one of the boys, appealed to the public for help.