The ten crates, part of a delivery of bananas from Equador, had a thin layer of bananas on top, beneath which bags of cocaine worth 50 million kroner ($8m) were hidden.
"It's enormous. This single seizure is as big as everything customs has seized in the last three years put together," Bjørn Røse, director of Norway's customs authority told the Dagbladet newspaper.
The crates were found on December 10 in a warehouse run by Bama, one of Norway's largest fruit trading companies, where the bananas had been left to mature.
Police believe that the cocaine was loaded in Equador and that neither Bama, the Norwegian company which imported the fruit, nor the company which transported it were aware of its contents.
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In June last year Danish customs found 200 kilograms of cocaine hidden in banana crates kept in the warehouses of the Coop supermarket chain. In October, British police seized 850 kilograms of cocaine hidden among bananas in a cargo from Colombia.