Members of the public walks behind the first London high street to be adorned with official banners, bunting and flags of the 2012 Olympic and Paralympic Games, Stratford, London, Friday June 8, 2012. (Photo: AP)
Members of the Unite union endorsed industrial action at a rate of more than nine to one Saturday, although strike dates have yet to be announced.
The union is seeking a $775 bonus for working over the games for each of the 20,000 bus workers it represents.
It's the latest group of transit workers to demand extra money to work over game time.
London's subway train drivers have already secured one-time payments of around $775 for working over the games, while those who run the capital's bicycle rental network have also asked for bonuses.
The games run from July 27 to Aug. 12.
(For more sports news and updates, follow Ahram Online Sports on Twitter: @AO Sports / and facebook AhramOnlineSports)