U.S. President Donald Trump warned China on Saturday that it should face consequences if it was "knowingly responsible" for the coronavirus pandemic, as he ratcheted up criticism of Beijing over its handling of the outbreak. "It could have been stopped in China before it started and it wasn't, and the whole world is suffering because of it," Trump told a daily White House briefing.

It was the latest U.S. volley in a war of words between the world's two biggest economies, showing increased strains in relations at a time when experts say an unprecedented level of cooperation is needed to deal with the coronavirus crisis.

"If it was a mistake, a mistake is a mistake. But if they were knowingly responsible, yeah, I mean, then sure there should be consequences," Trump said. He did not elaborate on what actions the United States might take.