Berlin • A vintage propeller plane plunged near-vertically into a Swiss mountain, killing all 20 people on board as they returned from a two-day trip to southern Switzerland, investigators said Sunday.
The Junkers Ju-52 plane, operated by small Swiss company Ju-Air, went down Saturday on the Piz Segnas mountain above the Alpine resort of Flims in the country's southeast, at an altitude of about 2,540 meters (8,330 feet) above sea level.
There was no immediate word on the cause of the crash, and officials said they expect a complex investigation given that the 79-year-old plane was not equipped with black boxes.