A crackdown on serious organised crime has recovered drugs worth £7.9 million and a large amount of illegal firearms.

The two-month campaign led to 134 arrests and helped officers seize more than £295,000 in cash while identifying £3.3 million of assets for restraint.

Strathclyde Police and other authorities targeted organised crime as part of wide-ranging efforts across the country.

The Break the Circle of Violence campaign, which ended on October 31, hoped to make a dent in the estimated £2 billion annual cost of serious crimes to Scotland.

Justice Secretary Kenny MacAskill said: "Strathclyde Police are to be congratulated for their hard work and effort which has dealt a hammer blow to Glasgow's crime gangs.

"The Scottish Government will not tolerate gangsters operating in our community and no effort will be spared to detaining them and stripping them of their assets."

The operation also uncovered 19 imitation firearms and led to 506 offences reported against alleged criminals. Officers visited 603 private security sites and 11 immigration offences were detected.

George Hamilton, assistant chief constable at Strathclyde, said: "I am optimistic about what we have achieved so far, but I want to stress this is not just a two-month campaign for us - we are fully committed to waging war on these serious and organised criminals."

The operation ended as work continues to establish the elite Scottish Intelligence Co-ordination Unit (SICU). A team of 40 officers - including intelligence and finance specialists - will target the top organised criminals and help the country’s eight police forces.

The unit was announced in June with £4 million funds over two years from the Scottish Government. The SICU will be temporarily housed in Livingston, West Lothian, until 2012 when the new Scottish Crime Campus is finished at Gartcosh, Lanarkshire.

Deputy chief constable Gordon Meldrum, the director general of the Scottish Crime and Drugs Enforcement Agency, said the SICU will act as the "brain" of law enforcement.

He said: "Serious organised crime groups are fluid and dynamic organisations operating across force, national and international boundaries.

"We need to understand our enemies better if we are to keep one step ahead of them. That's why the gathering and sharing of knowledge is such a powerful tool in the fight against serious organised crime."