Alberto Salazar and Galen Rupp
Galen Rupp (left) and Alberto Salazar (middle) have been accused in doping scandalGetty

Mo Farah's coach Alberto Salazar has spoken out in the wake of doping allegations made against him, saying his accusers have "knowingly made false statements".

It is the second time the US-based coach has spoken out against accusations made by the BBC's Panorama programme claiming that he oversaw the use of banned performance enhancing drugs by American long distance runner Galen Rupp.

By association, Mo Farah has become embroiled in the scandal and now faces a UK Athletics investigation. He withdrew from a Brimingham Diamond League race on 7 June over the allegations, saying he was angry at having his name "dragged through the mud".

There have been no accusations of rule breaking against Farah.

In a statement to the Guardian newspaper Salazar said: "I have said all along that I believe in a clean sport, hard work and I deny all allegations of doping. I will document and present the facts as quickly as I can so that Galen and Mo can focus on doing what they love and have worked so hard to achieve."

The International Association of Athletics Federations, the United States Anti-Doping Agency, and United Kingdom Anti-Doping are all investigating the allegations levelled at Salazar, who operates as an unpaid consultant for UK Athletics.

Despite UK Athletics initially having "no concerns" over Mo Farah's association with his coach and running partner Rupp, chairman Ed Warner has said Farah's medical data will now be assessed.

"What we can look at is all the data surrounding our own athlete, Mo Farah: blood data, supplements data – everything surrounding his medical treatment," Warner told Radio 4.

The International Association of Athletics Federations, the United States Anti-Doping Agency, and United Kingdom Anti-Doping are all investigating the allegations levelled at Salazar, who operates as an unpaid consultant for UK Athletics.

Though the allegations could yet be found to be untrue, Warner has indicated that the governing body's ties with Salazar could be ceased such has been the furore around his alleged misdemeanours.