Organisers of the 2006 World Cup have responded to a report criticising the safety of the tournament's stadia by calling for a fresh investigation.
German consumer group Stiftung Warentest heavily criticised the grounds in Berlin, Gelsenkirchen, Leipzig and Kaiserslautern last week.
World Cup marketing chief Horst Lichtner said: "We will demand a further independent study."
Lichtner said any problems uncovered would then be addressed immediately.
Germany is preparing 12 stadiums for the World Cup, which kicks off in June.
Stiftung Warentest, Germany's leading consumer safety group, said four of the stadia - Berlin, Gelsenkirchen, Leipzig and Kaiserslautern - had "grave" safety shortcomings.
Eight others - Hamburg, Hanover, Frankfurt, Dortmund, Stuttgart, Nuremberg, Cologne and Munich - had a few shortcomings or clear failings.
The head of the 2006 World Cup organising committee, Franz Beckenbauer, hit back at the findings.
He told the Bild newspaper: "The Stiftung Warentest might know what it's talking about with face creams, olive oil and vacuum cleaners, so it should stick to them."