The International Olympic Committee is investigating allegations that some agents are selling tickets for the London 2012 games on the black market.
The inquiry has been sparked by an undercover operation carried out by the British Sunday Times newspaper.
In secret filming, an agent working for Israeli and Cypriot official sellers describes different kinds of tickets to a number of events he has available, contravening the IOC’s re-sale ban.
More footage released by the paper show’s an official Lithuanian seller discussing the price of re-sold event tickets and how much they could fetch outside the EU – which is banned.
The IOC called an emergency meeting on Saturday after being presented with the newspaper’s findings which include allegations against 27 officials from 54 countries.