IAAF changes testosterone rules

The rules, which start on 1 November 2018, would apply to women who race in track events from 400m up to the mile.

The IAAF believes the new measures will stop women with high testosterone levels gaining a competitive advantage.

Olympic 800m champion Caster Semenya is expected to be among those affected.

The South African runner has previously been asked to undertake gender testing by athletics chiefs but no results have ever officially been made public.

Commonwealth Games: Mike Edwards accuses IAAF of cowardice

The 27-year-old arrived on the Gold Coast as part of the Nigerian team but is ineligible to compete because he represented Britain at the European Junior Championships in 2009.

Edwards, who was born in Manchester but has a Nigerian mother and citizenship, has protested against his situation with a home-made sign in the athletes' village.

"It was nine years ago - it is a worse sentence that a drug cheat gets," he told BBC Sport.

"I am walking around the village with my Nigerian kit and unsure if I can even walk in the stadium and represent.

Many coaches only know doping, says Russian Deputy PM Mutko

Mutko's comments follow a decision by the IAAF to uphold the ban on Russia's track team from international competition.

TheĀ IAAF banned Russia in November 2015 for widespread drug use, and said on Tuesday (AEDT) it is unlikely to reinstate the team until November.

That means there will not be an official Russian team at the world track championships in August, though there may be "neutral" athletes competing.