POLICE have made 20 arrests and seized £7 million worth of cocaine and amphetamine in a major four-month undercover operation.

Eight people were held yesterday, seven in Scotland and one in Lincolnshire, after a covert probe by the force's specialist crime division that spanned Glasgow, Renfrewshire and Merseyside.

Detective Chief Superintendent John Cuddihy, head of Organised Crime and Counter Terrorism, said: "We are absolutely determined to rid our communities of serious and organised criminal gangs and we will relentlessly target those involved in the sale and supply of controlled drugs.

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"Our officers have worked with the National Crime Agency and Merseyside Police throughout the operation.

"Hundreds of kilos of amphetamine have been seized and significant amounts of class A and class B drugs have been taken off the streets of the west of Scotland." Mr Cuddihy said the operation had "had a significant impact".

All eight men are expected to appear in court on Monday.