Four-time Olympic champion Mo Farah has split from coach Alberto Salazar and 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 investigated by the US Anti-Doping Agency (Usada) after BBC’s Panorama made allegations about drugs use at his US training base.
“I’m moving back to London. I really miss home,” said Farah, 34.
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.