The IAAF has provisionally suspended the chief executive of Athletics Kenya amid allegations he asked athletes for bribes to reduce doping bans.
The governing body for athletics said it took the decision concerning Isaac Mwangi “in the interests of the integrity of the sport”.
An investigation into “potential subversion of the anti-doping control process in Kenya” will now take place.
He denies wrongdoing and said he wanted to leave his post to clear his name.
The World Anti-Doping Agency (WADA) said it was “most disturbed” by the claims.
“The allegations have caused me a lot of mental anguish,” Mwangi said in a letter to Athletics Kenya.
“I am anxious to have my name cleared.”
Two suspended athletes claimed Mwangi had asked for money in exchange for more lenient punishments – allegations Mwangi said were “unsubstantiated”.
“Mr Mwangi remains innocent until the outcome of the investigation and the determination of any disciplinary charges which may follow from that investigation,” added the IAAF statement.
BBC Sport revealed last week that Kenya had missed a deadline to prove to WADA it was tackling cheating in athletics, following a string of positive drugs tests and corruption allegations.