Authorities say a 3-year-old boy has drowned in Table Rock Lake in southwestern Missouri.

Springfield television station KOLR reports the drowning happened Sunday night just before 9 p.m. in Stone County.

Authorities say the boy was left unattended and without a  life vest around 9 p.m. at the Mill Creek Park swim area at the lake and was found floating in the water later in the night. The child was flown to a Cox Hospital in Branson, where he was pronounced dead at 10:07 p.m. by Dr. Lane Garner.

The drowning was the 12th handled this year by the Missouri State Highway Patrol Troop D, which covers an 18-county area in the state's southwestern corner.