Four men including the 62-year-old pilot have died in a helicopter crash in southern Switzerland.

Police in the Italian-speaking canton (state) of Ticino said the helicopter with six people on board crashed after clipping a boulder as it was taking off from a granite quarry near the town of Lodrino early Saturday.

The co-pilot and a passenger survived.

Local news portal Ticino Online reported that they managed to jump out of the helicopter before it hit the ground.