The CIA says both a natural origin and a lab leak "remain plausible" as potential sources of covid-19, following a review of the pandemic's origins.

The nuanced finding suggests the agency believes the totality of evidence makes a lab origin more likely than a natural origin.

The CIA on Saturday offered a new assessment on the origin of the Covid outbreak, saying the coronavirus is "more likely" to have leaked from a Chinese lab than to have come from animals. But the intelligence agency cautioned it had "low confidence" in this determination.