AFP/ Berlin

Franz Beckenbauer is under growing pressure to explain his part in Germany's 2006 World Cup scandal amidst reports of a document pointing the finger at the legendary player and coach.

German football has lurched into a crisis over magazine Spiegel's report last month alleging that the votes of four members of FIFA's executive committee were bought in 2000, when Germany narrowly won the vote to host the 2006 finals.

At the centre of the scandal is a 6.7 million-euro ($7.2m) payment, which is alleged to have been used to purchase the support of FIFA's executive committee.

The scandal took a dramatic twist last week when police carried out raids at the Frankfurt headquarters of the German Football Association (DFB) and led to Wolfgang Niersbach resigning as DFB president on Monday.

State prosecutors have revealed three men -- including Niersbach, ex-DFB president Theo Zwanziger and ex-general secretary Horst Schmidt -- are being investigated for serious tax fraud surrounding the FIFA payment.

Despite his pivotal position in the 2006 World Cup -- first in leading the successful bid and later as chairman of the tournament's organising committee -- Beckenbauer, 70, has stayed tight-lipped in the last fortnight, even as Niersbach took "political responsibility" in resigning as DFB boss.

But now German daily Bild claims to have seen a draft agreement, signed in part by Beckenbauer, which it says was aimed at "buying votes for the German bid".

Munich-based Sueddeutsche Zeitung also quoted sources having seen the same document, reportedly signed in July 2000, just four days before Germany beat South Africa by 12 votes to 11 for the right to host the 2006 World Cup finals.

But 'the Kaiser' is under increasing pressure to shed some light on the 2006 World Cup scandal in Germany.

"I expect those who can contribute to the cleaning up, to do so," said Germany's Interior Minister Thomas de Maiziere on Tuesday.

- 'Shock and dismay' -

The Kitzbuehel-based agency representing Beckenbauer refused to comment on Tuesday to SID, an AFP subsidiary, but last month the German legend admitted making a "mistake" in the bidding process.

"In order to obtain a FIFA grant, we accepted a proposition coming from FIFA's finance commission that the implicated parties should, in retrospect, have refused," said the 'Kaiser', who captained the West Germany team that won the 1974 World Cup and then coached the side that won the trophy in 1990.

"As president of the organising committee at that time, I take responsibility for this mistake."

Niersbach has said the 6.7 million-euro payment was to obtain a FIFA grant to fund the 2006 World Cup finals and insisted "votes were not bought and there was no slush fund".

Vice-presidents Reinhard Rauball and Rainer Koch will now take over as interim co-chiefs of the DFB.

Ex-Germany striker Oliver Bierhoff, 47, has ruled himself out of the running to replace Niersbach as head of the German FA, but said news of the resignation had stunned the team who are preparing for Friday's friendly against France in Paris.

"It's not a subject for me, I am helping to prepare the Germany team for the 2016 European Championship and have an academy project, which I am enthusiastic about," said Bierhoff on Tuesday in Munich.

"It's been an intensive three weeks for everyone at the DFB.

"Even if you had counted on the fact that anything can happen, we're still shocked and affected by news of (Niersbach's) resignation.

"There is respect for him taking political responsibility, but also dismay, as it's no secret that Wolfgang Niersbach had a particularly close relationship with the squad."