In a statement on Tuesday Bern cantonal police said an investigation is in progress after two apartments were searched in the Swiss city over the past two weeks.
Seven men aged from 21 to 28 were in the apartments at the time and were taken into custody for questioning.
In the statement police said the operation was carried out in conjunction with police from the city of Lausanne and canton of Vaud.
In December last year Vaud police arrested a dozen people linked to an African cocaine trafficking network.
They were suspected of smuggling dozens of kilograms of cocaine into Switzerland using ‘mules' who swallowed packets of the drug before the journey and expelled the sachets on arrival.
No connection has been stated between the raid in Biel/Bienne and the smuggling ring.
Last November police in Basel seized a huge 191 kilos of cocaine from a shipping container transporting Brazilian coffee.
Police said at the time it was one of the largest cocaine seizures ever made in Switzerland.