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Fifa's ethics committee has said it will complete interviews next week with witnesses over alleged corruption in Qatar's bidding for the 2022 World Cup.
“After months of interviewing witnesses and gathering materials, we intend to complete that phase of our investigation by June 9, 2014, and to submit a report to the Adjudicatory Chamber approximately 6 weeks thereafter," the body said in a statement.
"The report will consider all evidence potentially related to the bidding process, including evidence collected from prior investigations.”
Nick Clegg has joined calls for the 2022 World Cup bidding process to be re-run if it is proven that the Qatari bid team bribed officials to secure the tournament.
The Deputy Prime Minister took to Twitter to comment on the "shocking" allegations that have emerged from a Sunday Times investigation.
These are shocking allegations about the bidding process for 2022 World Cup. If proven true, FIFA must rerun the contest fairly and openly.
David Cameron has revealed his personal frustration at the bidding process that saw England miss out on hosting the World Cup.
Discussing the allegations concerning Qatar's bid for the 2022 tournament, the Prime Minister said: "There's an inquiry underway, quite rightly, into what happened in terms of the World Cup bid for 2022. I think we should let that inquiry take place rather than prejudge it.
"My memories of that bidding process are...not happy memories in terms of the way the whole thing was arranged and the role of Fifa and the rest of it."
The chairman of the Football Association, Greg Dyke, has added his voice to calls for a re-run of the 2022 World Cup bidding process if allegations of corruption in Qatar's bid are proven.
Mr Dyke told Radio 4's Today programme: "I think it clearly has to be investigated as a matter of urgency by Fifa.
"And I think if it is shown that the process was corrupt or was corrupted then I do think there will have to be a whole discussion about whether or not you take it away from Qatar.”
Fifa needs to make a "quick decision" over whether the 2022 World Cup is held in Qatar or given to another bidder after allegations of bribery and corruption emerged, according to the journalist who broke the story.
Deputy Insight Editor at The Sunday Times, Heidi Blake, said Fifa were trying to pin responsibility for the decision on their investigator Michael Garcia, who was "currently in Oman, interviewing the bid committee".
"We think they're needs to be a quicker decision than that. Michael Garcia has already been investigating these allegations for two years and as far as we understand he hasn't found a smoking gun. The evidence is now here and we need a quick decision."
Qatar should be stripped of the World Cup if allegations of bribery and corruption are proven, a member of Fifa's Independent Governance Committee has said.
Lord Goldsmith, a former Attorney General, pointed out that the committee had already produced a report calling for Fifa to come up with a "convincing and transparent answer to these allegations".
He told Radio 4's Today programme that this response could mean taking the tournament away from Qatar: "What I believe that means - I'm not speaking for the committee...- is if these allegations are shown to be true then the hosting decision for Qatar has to be re-run."
The Australian football governing body has said it is "heavily involved" in investigating claims of corruption in Qatar's successful World Cup bid.
Football Federation Australia's chief executive David Gallop told local media they have been involved in interviews and the production of documents.
"We need to get more information about what's been revealed in the last 48 hours," he told SEN radio in Melbourne.
"But don't be under any illusion that we haven't been heavily involved in all of this for some time now.
"We've been involved in interviews, production of documents and also following carefully what's been happening away from Australia - so we've got people that have been involved for some time now."
FIFA vice-president Jim Boyce told ITV News he would back a new vote if allegations of widespread corruption were proved.
ITV News Correspondent Sejal Karia reports:
A Fifa vice-president has said he would have "no hesitation" in backing a re-vote to find a new host for the Qatar World Cup in 2022 if corruption allegations can be proven.
Speaking to ITV News, Jim Boyce said: "These allegations are obviously very, very serious. I have not yet had the opportunity to read the whole article. But I would say that anybody that has anything whatsoever should pass it over to Mr Garcia.
"If Mr Garcia comes back to Fifa, which he has to do, when he carries out these investigations with a full report, and makes certain recommendations, if a re-vote is what's necessary, I would have no hesitation whatsover in backing that, provided the allegations are completely true."
Qatar's successful bid to host the 2022 World Cup said that it won "because it was the best bid", the committee which organised the country's bid said. Regarding the latest allegations from The Sunday Times, a statement from the The Qatar 2022 Bid Committee:
....Mohamed bin Hammam played no official or unofficial role in Qatar's 2022 Bid Committee.
As was the case with every other member of Fifa's executive committee, our bid team had to convince Mr bin Hammam of the merits of our bid.
Following today's newspaper articles, we vehemently deny all allegations of wrongdoing.
We will take whatever steps are necessary to defend the integrity of Qatar's bid and our lawyers are looking into this matter.
The right to host the tournament was won because it was the best bid and because it is time for the Middle East to host its first Fifa World Cup.
The organisation denied any wrongdoing amid calls for the contest to be re-run if allegations about corruption in the bidding process are true. The Qatar 2022 Bid Committee said it had always upheld the highest standard of ethics and integrity in its successful bid to host the World Cup.
It said it was cooperating fully with the ongoing investigation of Fifa's Michael Garcia and remained totally confident that any objective inquiry would conclude it won the bid to host the World Cup fairly.