A Spanish customs ship intercepted the yacht yesterday some 200 nautical miles south of the Spanish holiday island of Gran Canaria, the interior ministry said in a statement.
Customs agents and police seized nearly 950 kilogrammes of cocaine found aboard the boat and detained the ship's three crew members - two Ukrainians and a Serb, the statement added.
The arrests "confirm the involvement of criminal groups in the transportation of cocaine from South America to Europe," it said.
Britain's National Crime Agency and an EU anti-narcotics unit, the Maritime Analysis and Operations Centre-Narcotics based in Lisbon, took part in the operation, the statement added.
Spanish police on November 6 seized nearly 600 kilos of cocaine from a Czech-registered sailing boat about 450 nautical miles southwest of Spain's Canary Islands and arrested its four crew members, all Czech.
Spain's proximity to north Africa, a major source of hashish, and its close ties with its former colonies in Latin America, a key cocaine-producing region, have made it the main gateway into Europe for drug traffickers.
