A team of Chinese researchers looked at influenza viruses found in pigs from 2011 to 2018 and found a "G4" strain of H1N1 that has "all the essential hallmarks of a candidate pandemic virus", according to the paper, published by the U.S. journal, Proceedings of the National Academy of Sciences (PNAS).
The move was among details of a new national security law for Hong Kong released by the official Xinhua news agency on Saturday - legislation that is expected to be passed soon by the standing committee of China's parliament, the National People's Congress.
President Donald Trump's former national security adviser John Bolton accused him of sweeping misdeeds that included explicitly seeking Chinese President Xi Jinping's help to win re-election.
The origins of a new cluster of coronavirus infections in Beijing are uncertain, World Health Organization officials said on Monday, but the claim that it might have been caused by imports or packaging of salmon was not the "primary hypothesis".
The government has dismissed claims, made by French newspaper Le Monde, that the Chinese secret services had installed devices in Malta’s EU embassy to spy on European institutions.
The photographs range from sweeping bird's eye views of boulevards packed with tens of thousands of demonstrators to close-ups of pitched battles between anti-China protesters and police seeking to restore order.
"China will do anything they can to have me lose this race," said Trump.
North Korean leader Kim Jong Un was not gravely ill according to South Korean and Chinese sources.
The world body also said in a risk report that nearly 369 million children across 143 countries who normally rely on school meals for a reliable source of daily nutrition have now been forced to look elsewhere.
The central Chinese city of Wuhan began allowing people to leave on Wednesday for the first time since it was locked down 76 days ago .