The IAAF has apologised following a cyber-attack that led to the release of athletes' personal details.
The 'Fancy Bears' hacking group, who leaked data from the World Anti-Doping Agency last year, published a fresh series of documents on Wednesday apparently taken from an IAAF database - three months on from world athletics' governing body confirming it had been the victim of a cyber-attack.
Four-time Olympic champion Mo Farah was among those to have details leaked. One of the documents shared suggested Farah's biological passport was viewed by an expert as "suspicious" in November 2015. A subsequent document from April 2016, following further testing, then appears to clear Farah of any suspicion, with his results viewed as "normal".
A spokesperson for Farah stated that any suggestion of misconduct is "entirely false and seriously misleading".
The IAAF confirmed it was the victim of a hack and has issued an apology.
A statement read: "The IAAF offers its sincerest apologies to the athletes who believed their personal and medical information was secure with us.
"We will continue to work with cyber incident response [CIR] firm Context Information Security, who identified the Fancy Bear cyber-attack which we announced in April -to create a safe environment. Context believes that the information published yesterday emanates from that attack.
"We continue to investigate any suspicion of doping in a robust way in accordance with applicable protocols and under WADA's supervision.
"It would be wrong to make assumptions based upon leaked documents without the full evidence and that evidence being put in context.
"Single data readings of an Athlete's Biological Passport [ABP] cannot alone constitute evidence of doping.
"All atypical ABP Profiles are automatically reviewed in the Anti-Doping Administration and Management System [ADAMS] following the processes and protocols of the World Anti-Doping Agency [WADA]."