The drugs were hidden among boxes of bananas, and the fruit went to the monkeys and other creatures at the Blijdorp zoo.
Dutch prosecutors said Friday more than eight tons of cocaine was hidden among the bananas on a ship from Ecuador. The drugs were seized Monday in the Belgian port of Antwerp, while the bananas were allowed to continue on to Rotterdam the shipment's final destination. Dutch police arrested a Belgian truck driver and four Dutch men on Tuesday.
Dutch authorities say the seizure is the biggest ever in the Netherlands or Belgium.