31 people had been aboard the vessel, known as a duck boat because it has wheels that allow it to ride on land as well Seven people were hospitalized and an unknown number were missing BRANSON: At least 11 people including children drowned when an amphibious “duck boat” carrying 31 people capsized and sank in stormy weather on a lake in Missouri on Thursday. Divers will resume searching for other victims on Friday, police said. Seven people were taken to hospital following the incident on the “Ride the Ducks” amphibious vehicle on Table Rock Lake, near Branson, Missouri, Stone County Sheriff Doug Rader told reporters. At least 11 people were killed in the incident as divers finished their search effort on Thursday night. They will resume searching early Friday for about five people still missing, the sheriff said later in a news conference. Emergency crews responded to the incident shortly after 7 p.m. (0000 GMT) after thunderstorms rolled through the area, the fire district said on Twitter. “There was some heavy wind. It was having problems through the wind,” Rader told reporters. “They were coming back toward land. There was actually two ducks. The first one made it out. The second one didn’t.” Seven victims including two critically injured were treated at the Cox Medical Center in Branson, the hospital said on Twitter. Video footage shot by an eyewitness who was on shore showed strong waves tossing two duck boats side to side. The video clip was posted online by KY3. Life jackets were on board the boat, Rader said. “Our number one priority is the families and our employees that were affected by this tragic accident; as of this time right now we are assisting the authorities as they continue with their search and rescue operation,” said Suzanne Smagala-Potts a spokeswoman for Ripley Entertainment, which owns the Ride The Ducks operation in Branson. She could not confirm how many crew members were aboard the boat. Duck amphibious vehicles are used on sightseeing tours around the world and have been involved in a number of fatal accidents in the past two decades. The company that builds ducks, Ride the Ducks International LLC, agreed in 2016 to pay a $1 million fine after one of the vehicles collided with a bus in Seattle, killing five international students. The company admitted to failing to comply with U.S. vehicle manufacturing rules.