IAAF council member Frankie Fredericks has been provisionally suspended from athletics pending an investigation into a potential ethics violation, the sport's governing body said on Monday.
The Namibian is being investigated by the Athletics Integrity Unit (AIU) over payments he allegedly received from Papa Massata Diack, the son of ex-IAAF president Lamine Diack.
In March, French newspaper Le Monde claimed former sprinter Fredericks received a payment days before voting on the 2016 Olympics host city.
The four-time Olympic silver medallist denies the allegations.
Fredericks stepped down from two key administrative roles in March following the accusations.
He quit as head of the evaluation commission for the 2024 Olympics, and left a taskforce helping Russia return to international competition.
As head of the IOC evaluation commission, Fredericks was to lead an inspection visit to 2024 candidate cities Los Angeles and Paris.