A fire broke out at a chocolate factory at Lindt & Spruengli's headquarters in Kilchberg near Zurich in Switzerland on Tuesday, but was quickly extinguished, Zurich police and the company said.
"We had to evacuate the building, a few people appear to have suffered smoke poisoning," a spokeswoman for the Zurich cantonal police told Reuters, adding it was not clear what had caused the fire.
Lindt & Spruengli spokeswoman Nathalie Zagoda said it was too early to assess the damage or whether production had been affected.
Lindt & Spruengli, which in the United States owns the Russell Stover brand of chocolates, is known for its gold foil-wrapped Easter chocolate bunnies and Lindor chocolate balls. The company has factories in Switzerland, Germany, Italy, France, Austria and the United States.