A senior International Olympic Committee official has called for anyone found guilty of selling London 2012 tickets on the black market to be banned from any future role in sport.

The IOC has launched an investigation into allegations by the Sunday Times that 27 Olympic officials and agents, representing 54 countries, were prepared to breach regulations on ticket sales.

Denis Oswald, a member of the IOC executive committee and the London organising committee, insisted: "These people should no longer belong to the Olympic movement."

Oswald, who participated in Saturday's emergency IOC meeting via conference call, suspects there will have been similar cases at every previous Olympic Games but never a scandal on this scale.

He claimed: "We will ask for the documents and the tapes, whatever is existing from the Sunday Times. If this is confirmed then sanctions must be taken. For me (banning them from distributing tickets in the future) would not be enough. These people should no longer belong to the Olympic movement.

"People were aware they were breaking the rules. It is why it is very serious, especially people in situations where they have responsibilities for their own national sport and are prepared to break the rules.

"There are probably differences between the different cases and you cannot treat everybody the same. But, depending on the result of the inquiry, there could be a sanction that people are no longer accepted in the Olympic movement and therefore they should have no link with sport in their own country."

Oswald was voicing a personal opinion because the issue of sanctions had not been discussed by the IOC.

The former Swiss Olympic rower, who won a bronze medal in 1968, stressed that any punishment should only affect the individual involved and not have an adverse impact on the athletes or the National Olympic Committees.

The IOC is investigating claims that the 27 officials and agents were "willing to break the rules by offering to buy or sell tickets outside their territory, sell tickets at inflated prices, or sell tickets to unauthorised resellers".