Athletes from Ebola-hit nations barred from some Youth Olympics events

"Athletes from affected areas will not compete in combat sports" and "it was also decided that no athletes from the region would compete in the pool," they said in a statement.

The decision, which affects two athletes in combat sports and one in pool events, was made "with regard to ensuring the safety of all those participating" in the Games taking place in the eastern Chinese city of Nanjing, the statement said.

Additionally, all those in delegations from west Africa "will be subject to regular temperature and physical assessment" during the Games.

"We have been reassured by the health authorities that there have been no suspected cases and that the risk of infection is extremely unlikely," it added.

The Youth Olympic Games are being held in Nanjing, China's former capital, from August 16 to 28, and feature more than 3,700 competitors aged 15 to 18 -- some of whom hope to build towards a place in the 2016 Olympic Games to be hosted by Brazil.

The world's worst-ever outbreak of Ebola in west Africa has killed 1,069 people so far and sparked international alarm, with several major airlines cutting flights to the region.

Guinea, at the epicentre of the epidemic, has declared a "health emergency" and imposed strict border controls, and the United States has ordered diplomats' families evacuated from neighbouring Sierra Leone, which is also affected. Liberia and Nigeria have also recorded cases.