Lord Coe has denied flagging up allegations of bribery ahead of the vote to decide the host city for the 2017 World Championships.
Coe was a vice-president of the IAAF at the time of the vote which was held in Monaco in November 2011. He led London's final presentation before the 26 members of the IAAF council cast their votes.
He has since been elected president of athletics' world governing body, with the two-time former Olympic 1,500metres champion stating his determination to clean up the sport after recent doping scandals.
Co e has repeatedly denied he knew of major corruption within athletics during his time as vice-president.
Two bids by Qatar's capital Doha for the 2017 and 2019 editions of the World Championships have been referred to the IAAF's ethics commission following allegations of "brown envelopes" and bribe demands, UK Athletics chairman Ed Warner this week told the culture, media and sport select committee in London.
Warner said he had been told of the referrals by the IAAF but refused to reveal the name of the "very senior IAAF person" who had told him of reports of brown envelopes full of cash being handed out just before the vote for the 2017 World Championships.
The Daily Mail reported on Thursday it had two witness accounts of Coe warning London 2017 officials of a possible bribes-for-votes plot in Monaco.
A spokesperson for Coe told the newspaper: "Sebastian Coe denies knowing of bribes being offered or received linked to the 2017 World Championships."
London won the vote 16-10 and will stage the World Championships next year. The Qatar Athletics Federation has always denied any wrongdoing during the voting process.