Several people have been killed and seriously injured during a shooting at a factory near the Swiss city of Lucerne, police say.
The incident happened at a wood processing company called Kronospan in the town of Menznau, police said in a statement.
It said emergency services were on the scene.
Switzerland has one of the highest rates of gun ownership in the world, but relatively little gun crime.
Three helicopters have arrived on the scene, the Swiss news website 20minutes reports.
It said an emergency telephone line had been set up for families of the factory’s employees.