The Competition Commission has launched an anti-trust investigation into a distribution agreement between Coca-Cola and Switzerland's largest beverages distributor, Feldschlösschen.
The Commission said in a statement on Tuesday that it was probing claims that the section on supplying hotels, restaurants and cafes could be anti-competitive.
The investigation will examine in particular whether competitors' products were being sold on discriminating terms.
The Commission noted that Coca-Cola's Sprite, Fanta and Coke brands had a strong market position in Switzerland, while Feldschlösschen was the country's largest distributor.
Feldschlösschen's agreement with Coca-Cola replaced a similar accord with Pepsi.
Feldschlösschen is Switzerland's largest brewer and is being bought by Denmark's Carlsberg in a deal worth SFr870 million ($486 million).
swissinfo with agencies