MADRID, Spain (AFP) — Spanish authorities said on Thursday that a massive cocaine shipment intercepted in the Atlantic Ocean weighs 30 tonnes, clarifying the scale of a record haul initially estimated at up to 40 tonnes.

The confirmed total has an estimated value of 812 million euros ($956 million), Spain’s top criminal court, the Audiencia Nacional, said in a judicial order.

The 23 crew members aboard the vessel when it was intercepted by the Civil Guard on May 1 in international waters off Spain’s Canary Islands have been placed in pre-trial detention, it added.