An organised crime gang has been jailed for a total of 25 years following a £1.5m cocaine seizure.

At the High Court in Glasgow on Wednesday, brothers Ryan and Leigh Dobson were among the six jailed for the drug dealing activities.

The pair operated from Stirling and were targeted by Central Scotland Police, who found they were involved in a network of deal cocaine and other drugs throughout the region. The police operation resulted in the seizure of £1.5m in drugs throughout the Stirlingshire region and beyond.

Ryan Dobson, 29, received a five and a half years and Leigh Dobson, 27, was jailed for eight years.

Their driver, 23-year-old Craig Cowie, was jailed for four years for his part in distributing drugs.

As part of Operation Nomad, officers raided the bedroom of Kyle Henderson, 24, in Bannockburn Road, Stirling, on August 18, 2011. Cocaine worth £1700 was recovered and he received a three-year jail term at the High Court for his part in the trafficking operation.

Last September an associate of Leigh Dobson, 23-year-old Iain McDonald, of Stirling, was stopped by police and found to be in possession of 1.5 kilos of cocaine worth £90,000. McDonald pleaded guilty and was jailed for four years at the High Court in Glasgow on December 21 last year.

Homeless accommodation occupied by Keith Fitzwater, 27, at King Street, Stirling, was searched by police on October 17 last year. Cocaine worth £56,000 was recovered and Fitzwater was jailed for four and a half years for his part in the operation.

The home of Christine Wingate, 45, in Stirling’s Springfield Road was searched by police last year in relation to Operation Nomad. Cocaine, worth around £56,000 was recovered from the property where the Dobson’s associate lived. On Wednesday she was given a community payback order 300 hours community service.

Central Scotland Chief Inspector Stephen Sneddon said: "As the operation developed it became clear that they were involved in the wide-scale distribution of controlled drugs including cocaine throughout the Central Scotland Police area. They also had links to organised crime groups operating in the Strathclyde Police area."

He added: "This operation came about as a result of information from the community. We need the continued support of the community to help us build up a case to be able make arrests and we do act on information received. The people involved in this case, and others involved in drugs, cause untold misery to our communities and this shows our determination in pursuing those involved in dealing in drugs."