Dutch customs officers confiscated over three tonnes of cocaine stashed in a container of cassava roots in Rotterdam harbour, the second largest haul to date for Europe’s largest port, prosecutors said Sunday.

“The cocaine was in a container with cassava from Costa Rica packed with 3,003 packages weighing a total of 3.5 tonnes,” the Public Prosecutor’s office said in a statement.

The cocaine had a total street value of 120 million euros ($149 million), added the statement, saying the drugs were discovered in a container on a business premise in the massive harbour.

The drugs were then destroyed.

“The haul is the second-largest ever in the Rotterdam harbour,” prosecutors said.

In 2005 law enforcement discovered 4.2 tonnes of cocaine hidden in cable reels in the Rotterdam port.

Law enforcement were now trying to track those behind the huge haul, prosecutors said.