The incident happened at Kronospan, a wood processing company,around 9am local time. The gunman was a 42-year-old man who hadworked at the factory for ten years.
Workers were eating in the cafeteria at the time of theshooting, according to 20 Minuten Online.
The Swiss Air Rescue REGA deployed three helicopters to thescene. Four seriously injured workers were sent to two differenthospitals, SDA news agency reported.
"I am shocked and stunned. This is an incomprehensibleact," Mayor of Menznau, Adrain J. Duss ,said.
Chief executive of Kronospan, Mauro Capozzo, said the gunman wasa quiet man.
"One almost didn't see or notice him," he said, accordingto Reuters.
An emergency hotline has been set up for families and employeesof Kronospan.
The factory made headlines on February 23 when it announced itwould be cutting production, due to a massive timber shortage.Capozzo has denied rumors that job cuts were due to beannounced.
Kronospan is an international company which specializes inmanufacturing and distributing wood-based panels. The companyemploys more than 11,000 people in 25 countries worldwide.
The shooting comes just one month after a gunman killed threewomen and wounded two men in the Swiss village of Daillon.
Switzerland is known to have one of the highest rates of gunownership in the world, but relatively little gun crime. Estimatesindicate that at least one in every three Swiss residents owns agun.
