Mo Farah splits from coach, will return to Britain

Farah, who won 5,000m and 10,000m gold at London 2012 and Rio 2016, said his decision was based on a desire to move back to London.

Salazar is being probed by the US Anti-Doping Agency after BBC's Panorama made allegations about drugs use at his US training base.

He will now work with Gary Lough, who previously coached — and is married to — women's marathon world record holder Paula Radcliffe.

Salazar said he has offered to continue working with Farah in an advisory role.

Farah has been coached by Salazar at the Nike Oregon Project camp since 2011, winning six world titles in addition to his four Olympic golds.

Both Farah and Salazar deny having broken anti-doping rules.

"I am a firm believer in clean sport and I strongly believe that anyone who breaks the rules should be punished," Farah told the Sun.

"I'm not leaving the Nike Oregon Project and Alberto Salazar because of the doping allegations."