A gang operating in the Benidorm-Valencia area imported large amounts of cocaine, mainly from South America.
Eight people were jailed for the arrests, and 334 kilograms of the drug hidden in heavy industrial machinery was seized.
Police raided a warehouse located in Onda, a province of Castellon. It was brought from Costa Rica to the port at Valencia.
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The stash was divided into 299 packs with three kilos of methamphetamine, €25,000 in cash, and nine vehicles also removed by authorities.
In May last year, a gang of criminals stole motorhomes and resold them. Officers then discovered documents that related to drug trafficking.
A shipment of 13 kilograms of cocaine bound for Spain has been intercepted by Columbian authorities through international cooperation.
Two containers, directly connected to the gang under investigation, arrived in Valencia from Costa Rica in December.
Six raids followed the seizure of the cache in Benidorm, La Nucia (province Alicante) and the Valencian towns El Puig de Santa Maria & Benetusser.
This led to nine people being arrested for drug trafficking, and membership in a criminal organization.
One of the people investigated has been using false Portuguese documents since 2019 in order to create a new identity.
The National Court had already sentenced him to prison for drug trafficking.
Police are searching for a man that was not in his La Nucia house during the raids.