LAKE GENEVA, Wis. (CBS 58) -- Officials say three people have died after a boat capsized in Geneva Lake near Big Foot Beach State Park Friday, July 3. 

A strong storm quickly moved through the area midday on Friday, with the National Weather Service issuing a tornado warning for parts of southeast Wisconsin. 

During a press conference Friday afternoon, officials said seven people were rescued from the water, however three were unable to be saved. The Geneva Lake law enforcement agency and DNR are investigating.

"After the storm dissipated, everyone was getting their bearings about themselves, and then you started to hear the sirens come," said witness Joseph Roberts. "My mom, she was very inquisitive. She walked over where the first cop car was, and there were just a couple parents over there who were just distraught, and she heard- verbally, herself- that they were missing, her kids. Sounded like three to her. "

Lake Geneva police confirm this is an active and ongoing investigation. 

Stick with CBS 58 on-air and online for updates.