But they're still testing other lab theories.
US spy agencies have concluded that Covid-19 was "not man-made or genetically modified".
But the Office of the Director of National Intelligence says they're still examining whether the origins can be traced back to contact with infected animals or an accident at a Chinese lab.
The announcement was made on Thursday and came via the Office of the Director of National Intelligence, the clearing house for the web of US spy agencies.
Donald Trump and his allies have been touting the so-far unproven theory that an infectious disease laboratory in Wuhan, the epicentre of the Chinese outbreak, was the source of the global pandemic.
