A declassified US intelligence report saying it was plausible that the Covid-19 pandemic originated in a laboratory is unscientific and has no credibility, Chinese foreign ministry spokesman Wang Wenbin said in a statement on Sunday.

The updated US intelligence briefing, published on Saturday, said that a natural origin and a lab leak were both plausible hypotheses to explain how SARS-CoV-2, the virus responsible for Covid-19, first infected humans, but that the truth may never be known.

In a response Sunday on the website of China's Ministry of Foreign Affairs, Wang said...