Mo Farah pulls out of Birmingham Diamond League race

An "emotionally and physically drained" Mo Farah has withdrawn from Sunday's Diamond League meeting in Birmingham.

The double Olympic champion wants "to go back to the US and seek answers" after a "stressful week" that saw a BBC investigation allege his coach Alberto Salazar had been involved in doping.

There is no suggestion Farah has done anything wrong but he is"angry" at his name being "dragged through the mud".

Salazar strenuously denies the claims made by the BBC's Panorama programme.