Four people died late on Sunday after a tourist boat capsized on Lake Maggiore in northern Italy due to a sudden whirlwind, the fire brigade and media reported.
People were celebrating a birthday on the 16-metre-long boat when it capsized and sank in a violent storm.
Nineteen survivors swam to shore without serious injury, the fire brigade said on Twitter, adding the wreck was found by its divers at a depth of 16 metres.
