All 20 people on board a vintage plane were killed when the aircraft crashed into a mountainside in south-east Switzerland, police said.
A Swiss news website quoted police spokeswoman Anita Senti as saying that police now know all 20 people on the Junkers Ju-52 propeller plane died in the crash on Saturday near the Alpine resort of Flims.
Eleven men and nine women were killed, officials said. Most were from Switzerland but also a couple and their son from Austria.
The plane was operated by Ju-Air, a Swiss company that offers tours with vintage former Swiss military aircraft.
Swiss officials said they are not aware of any distress call from the plane. They also expect the investigation into the cause of the crash to be "relatively complex".
Daniel Knecht, of the Swiss Transportation Safety Investigation Board, said the plane appears to have hit the ground near-vertically and at high speed in the crash.
Mr Knecht said the vintage plane presumably did not have the crash-resistant cockpit voice and data recorders that more modern aircraft have.
He said officials have essentially ruled out a collision with another aircraft or hitting an obstacle such as a wire.
He also said there is no indication of foul play or that the aircraft lost parts or broke up before the crash.