FIFA's chief investigator Michael Garcia will interview the remaining members of the executive committee who voted for the 2018 and 2022 World Cups, according to a Press Association report.
Only 11 of the 24 members -- plus FIFA president Sepp Blatter -- who voted in December 2010 in are still on the committee, with the others having either retired or been banned or resigned while under investigation.
Garcia, a U.S. attorney who is the head of the investigatory chamber of FIFA's ethics committee, is in Zurich this week ahead of an executive committee meeting on Thursday and Friday.
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. Interviews have already taken place with a number of officials who worked on England's unsuccessful 2018 bid.
Press Association, citing anonymous sources connected to FIFA, say Garcia will now interview all the remaining executive committee members still in office, plus Blatter.
The interviews will focus on the bidding process and look into any allegations of wrongdoing and breach of bidding rules including collusion between bids.
Garcia's interviews come 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 FIFA in disgrace following a 2011 corruption scandal.
Qatar's 2022 World Cup organising committee said its bid committee strictly adhered to FIFA's bidding regulations.