Two World Health Organization experts were heading to the Chinese capital on Friday to lay the groundwork for an investigation into the origins of the coronavirus pandemic.

Axar.az reports citing foreign media that an animal health expert and an epidemiologist will meet Chinese counterparts in Beijing to work out logistics, places to visit and the participants for a WHO-led international mission, the U.N. organization said.

A major issue will be to “look at whether or not it jumped from species to human, and what species it jumped from,” WHO spokesperson Dr. Margaret Harris said at a briefing in Geneva.

Scientists believe the virus may have originated in bats and was transmitted to another mammal such as a civet cat or an armadillo-like pangolin before being passed on to people.