Fifa chief investigator Michael Garcia has interviewed everyone still on the body's executive committee who was there during the controversial votes for the 2018 and 2022 World Cups.

Only 11 of the 24 members - plus president Sepp Blatter - who took part in the December 2010 decision are still on the committee, with the others having either retired or, in some cases, been banned or resigned while under investigation.

US lawyer Garcia, who heads Fifa's ethics committee investigatory chamber, made a surprise swoop on the executive committee meeting in Zurich yesterday.

Last September, Garcia said his probe into the bidding process for the 2018 and 2022 World Cups would see investigators interview representatives of every bid team.

The interviews with EC members are expected to focus on the bidding process and look into any allegations of wrongdoing and breach of bidding rules including collusion between bids.

It comes after a report that the FBI is investigating payments from a company owned by Qatari Mohamed Bin Hammam to fellow former Fifa member Jack Warner and his family. Both men left in disgrace following a 2011 corruption scandal.

The pair are no longer under Fifa's ethics code so cannot be disciplined by Garcia.

It is still unclear when the results of his investigation will be published but insiders have said it's unlikely to be before this summer's World Cup in Brazil.

Meanwhile, the former head of Australia's unsuccessful bid for the 2022 tournament said he hoped the investigation would come up with "the right answers."

Frank Lowy said he still hoped Fifa would refund the £25 million of public money spent on the Australian bid if the 2022 tournament is moved to winter.

Lowy told Australian media: "It is generally known ... that the process was not exactly a good one, to say the least.

"I've read the papers and while I would not use the word 'corruption,' I think the process wasn't quite clear to everybody and the jury is still out.

"It was not a level playing field and I said at the time that we had not heard the last word about the process.

"I still don't think it is going to go away. These stories are coming up from time to time and until Fifa makes the final decision it will regurgitate each time."

Qatar's 2022 World Cup organising committee said its bid committee strictly adhered to Fifa's bidding regulations.

In addition to corruption claims, Qatar has increasingly come under pressure for its abysmal treatment of migrant workers.