Yuliya Stepanova, the Russian 800-metre runner who lifted the lid on systematic doping fraud and corruption in Russian athletics, will not not compete in the Rio Olympics next month.

The International Olympic Committee on Sunday orders individual sports federations to decide whether Russian competitors should take part in the Rio Games after failing to agree on a complete ban over Russia's state-run doping.

Brazil hold 10 presumed Islamist militants in isolation cells at a maximum security jail as police comb their computers and mobile phones for information about possible threats to next month's Olympics in Rio de Janeiro.

Russia insist it expects to avoid a blanket ban from the IOC on its competitors at the Rio Olympics despite its track and field squad losing an appeal over a suspension for state-sponsored doping.

A North American-led campaign to ban Russia from the Rio de Janeiro Olympics has opened up an international divide on how to deal with the doping scandal engulfing Russia.

The World Health Organization (WHO) plays down concerns over the spread of the Zika virus, amid calls for the Rio Olympics to be postponed.

Australia's Olympians will be issued with free super-strength condoms in Rio to minimise any infection from the Zika virus, officials say on Monday.

The International Olympic Committee (IOC) says that it sees no need to cancel, delay or move the Rio Olympic Games because of the Zika virus threat.