Australian Prime Minister Scott Morrison, who has angered Beijing by calling for a global inquiry into the coronavirus outbreak, said he had no evidence to suggest the disease originated in a laboratory in the Chinese city of Wuhan.

U.S. President Donald Trump said on Thursday he was confident the coronavirus may have originated in a Chinese virology lab, but declined to describe the evidence he said he had seen.

Morrison said on Friday that Australia had no information to support that theory, and said the confusion supported his push for an inquiry to understand how the outbreak started and then spread rapidly around the world.

“What we have before us doesn’t suggest that that is the likely source,” Morrison told a news conference in Canberra when asked about Trump’s comments.

“There’s nothing we have that would indicate that was the likely source, though you can’t rule anything out in these environments,” he said.

“We know it started in China, we know it started in Wuhan, the most likely scenario that has been canvassed relates to wildlife wet markets, but that’s a matter that would have to be thoroughly assessed.”

The Wuhan Institute of Virology (WIV), based in the city where the disease was first identified, has rejected suggestions the coronavirus came from its laboratory.