One of the three men who met the yacht was "a known member" of the San Diego chapter of the Hells Angels and another had been under investigation for suspected drug smuggling by the Royal Canadian Mounted Police, the statement said.
The smuggling operation had been under police surveillance since July 30 and culminated when officers raided two vans loaded with cocaine and arrested the Canadians.
In a separate operation, police arrested two other persons whose nationality was not disclosed but who were "responsible for the delivery of the drug" to Spain, the statement said.
The arrests were the result of collaboration between Spanish police and the U.S. Drug Enforcement Agency, Canada's mounted police, EUROPOL and France's tax authority, the statement said.
The statement did not say when the arrests took place.
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