The World Health Organization (WHO) says it has finished laying the groundwork for a probe into the origins of Covid-19.
The UN health agency said two experts had completed a "scoping mission" in China, marking the initial phase of an investigation aimed at identifying how humans were infected with coronavirus.
An international team, including leading scientists and researchers from China and around the world, will now begin investigations.
Studies will start in the Chinese city of Wuhan, where the virus was first identified late last year.
It is thought the disease originated at an animal market in Wuhan, where it was transferred to a person.