Interior Minister Fernando Grande-Marlaska told reporters in Madrid that the seizure was “one of the biggest, not only nationally but internationally”.
The Civil Guard shared a photograph on X showing the drugs stuffed into the hold of the intercepted vessel.
“Today history is being written in the Maritime Service of the Civil Guard,” it wrote.
“Intercepted in international waters the largest known seizure: between 30,000 and 45,000 kg of cocaine on board a freighter.”
While the boat was headed to Libya, AFP reported that the pattern of previous operations suggests that it was due to offload the drugs onto smaller vessels for distribution in Europe.
In January, Spanish authorities made its biggest seizure of cocaine at sea from a ship that was carrying almost 10 tonnes.
