New emails have shown that Lord Sebastian Coe was 'made aware' of corruption allegations in athletics months before they became public.
Coe, who is President of the International Association of Athletics Federations (IAAF) told a parliamentary select committee in December 2015 that he was not aware of allegations of corruption surrounding the Russian doping scandal.
However, an email from Coe to the IAAF ethics commission in August 2014 states "I have now been made aware of the allegations."
The emails, published by the committee has cast questions on what Lord Coe knew about the Russian corruption scandal.
Damian Collins, Chairman of the committee said "The committee asked him about his knowledge of doping in Russian athletics and corruption within the sport. He gave the impression that he was unaware of specific allegations".
Shadow Sports Minister Dr Rosena Allin-Khan said "These are very troubling allegations."
She added: "World athletics is going through one of the most serious doping scandals in its history and requires strong leadership. Lord Coe must come back to the committee and clarify his evidence."