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The British-registered Squilla was taken to port after being intercepted off southern Spain

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Four crew members on board the Squilla - including two Scots - were arrested

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The vessel was searched by Spanish police

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The Spanish authorities said that eight tonnes of cannabis were found

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The haul is estimated to have a street value of �24m

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The operation was co-ordinated by the Scottish Drug Enforcement Agency (SDEA)

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The swoop was carried out with help of Spanish and international law enforcement agencies

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The vessel was escorted into Cadiz in southern Spain, where it was tied up