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Seventeen private companies have been appointed to provide security and stewarding services at the Commonwealth Games.
The firms will support police and military personnel throughout Glasgow 2014.
They have been contracted following a tendering process by organisers which looked at various factors including capability and value for money.
Organisers said those working in security and stewarding roles will go through a "rigorous and stringent'' accreditation process run jointly by Police Scotland and the Home Office.
Police Scotland Deputy Chief Constable Steve Allen, who is security director for the Commonwealth Games, said: "Planning for the safety and security operation has taken place over the past seven years.
"It's an operation unprecedented in scale in terms of the resources needed to ensure the Games run safely and securely across all aspects of the event.
"Police officers, private contract security staff and safety stewards and military personnel will all be working together to keep people safe before and during the Games as we see an influx of visitors to Glasgow and Scotland and local communities get ready for the Games.''
Officers from the Scottish Prison Service, special constables and Police Scotland youth volunteers will also be helping at the event.
David Leather, Glasgow 2014 chief operating officer, said: "We recognise and value the important role private security suppliers have to play and we are delighted to have created the opportunity for a wide range of security providers to contribute to delivering a safe and enjoyable Games experience for athletes, officials and spectators under the guidance of Police Scotland.
Contracts have been awarded to SecuriGroup Services Ltd, Show & Events Security Limited, Sword Event Guard Ltd, The Protector Group Limited, Allander Security Limited, Controlled Event Solutions, Corps of Commissionaires Management Ltd, Kingdom Security Ltd, Servoca PLC, T.S.S. (Total Security Services) Limited, Vigilant Security (Scotland) Ltd, Wilson James Limited, AP Security (APS) Limited, Celtic F.C. Limited (Protect Event), G4S Secure Solutions (UK) Limited, Garrion Security Services Ltd and Stadium Traffic Management Ltd.