All 20 passengers on board with 17 Swiss and 3 Austrians, were killed in a plane crash on Sunday. The small vintage plane, that was returning from Locarno, near Switzerland's southern border, crashed in Swiss Alps. Accident happened before 5 PM local time. Accident investigators and rescue personnel gather around the wreckage of a Junkers JU52 aircraft at Flims on August 5, 2018, after the plane crashed into Piz Segnas, a 3,000-metre (10,000-foot) peak in eastern Switzerland on August 4. (FABRICE COFFRINI/AFP/Getty Images)
Police informed that most of the passengers were couples and one family.
Investigation will take several days due to the fact of the "black box" flight recorder. Only the "black box" will reveal the accident reasons.
The last maintenance check was in late July at which time no defects were found.
Airline Chief Executive Kurt Waldmeier expressed himself in a conference about the accident "Yesterday was the worst day in 36-year history of JU-Air". It was the first time the company experienced an accident with consequences of death and injuries.
The company was established in 1982. JU-Air offered a variety of activities such as sightseeing, charter and adventure flights with 3 mid-century Junkers JU-52 that were shut down by the Swiss Air Force. They were also known as in German as "Auntie Ju" planes.
Daniel Knecht, who is from the aviation division of the Swiss Transportation Safety Investigation board, said that "One can ascertain that the aircraft hit the ground nearly vertically at high speed".
After the accident, rescuers and helicopters were where the accident took place. The crash happened 2,450 metres (8,000 feet) above the sea level.
From now on area that was near and popular for the hiking and the airspace above the crash is blocked and closed by the Federal Office For Civil Aviation.