Swiss federal prosecutors say they are conducting an "ongoing operation" in an investigation of the 2006 World Cup organizing committee as part of a wider probe of corruption linked to FIFA.

The office of Swiss attorney general Michael Lauber tells The Associated Press that details of the operation should be confirmed later Thursday.

German organizers of the 2006 World Cup, led by Franz Beckenbauer, have been under investigation by Swiss prosecutors and the FIFA ethics committee over alleged bribery and irregular payments of several million dollars linked to FIFA.

Beckenbauer headed his country's bid to win the hosting rights in 2000 in a tight vote ahead of a South Africa bid backed by Nelson Mandela. He then chaired the organizing committee.

Beckenbauer has denied wrongdoing.