The largest discovery of cocaine in at least 15 years leaves Berlin police surprised that there could be such a logistical error in the smugglers delivery chain.

According to NBC, supermarket staff discovered the containers with a total of 140 kilograms of cocaine on Monday shortly before the fruit went on sale to the public, police and customs investigators said.

It was the largest discovery of cocaine in Germany's capital in about 15 years and has an estimated black market value of 6 million euros ($9.1 million), according to police.

The banana cartons, part of a consignment of 1,134 boxes, were brought by ship from Colombia to Hamburg and delivered to a fruit wholesaler in Berlin.

No arrests have been so far.