The United States and South Africa are among at least five countries that have filed preliminary paperwork required by the IOC ahead of any potential bids for the 2020 Olympics.

The U.S. and South African Olympic committees told The Associated Press they submitted forms confirming compliance with rules of the World Anti-Doping Agency and Court of Arbitration for Sport.

The documents were filed before Saturday, the deadline set by the International Olympic Committee.

Italy, Japan and Spain said they also sent in their forms. Turkey and Qatar would not confirm they filed the papers, but are believed to have done so.

National Olympic Committees have until Sept. 1 to submit the names of any 2020 applicant cities to the IOC.