UPDATE: Investigators with the Coast Guard and National Transportation Safety Board are investigating a duck boat accident that killed 17 people in southern Missouri.

Coast Guard Petty Officer Lora Ratliff says the agencies are working “side-by-side” to determine what caused the Ride the Ducks boat to sink Thursday night in Table Rock Lake in the Branson area. NTSB spokesman Peter Knudson says its investigators are arriving Friday.

Authorities are releasing few details, including whether the people aboard were wearing life jackets. The NTSB and Stone County Sheriff Doug Rader are urging anyone with video or photos of what happened to provide them to authorities.

ORIGINAL STORY: A Missouri sheriff says at least 11 people have now been confirmed dead after a boat carrying tourists on a lake in a popular vacation city capsized and sank.

Stone County Sheriff Doug Rader says seven people have been hospitalized and five others remain missing. He says divers have ended their search of Table Rock Lake in Branson for the night.
The National Transportation Safety Board said on Twitter that investigators will arrive on the scene Friday morning.
Rader says stormy weather is believed to be what caused the Ride the Ducks boat to capsize Thursday night.
National Weather Service meteorologist Steve Lindenberg says the agency issued a severe thunderstorm warning for the Branson area Thursday evening. He says winds reached speeds of more than 60 mph.