British Prime Minister Boris Johnson, who was in hospital due to persistent coronavirus symptoms, has been shifted to the intensive care unit after his coronavirus symptoms "worsened", Downing Street has said.

Nadia, a 4-year-old female Malayan tiger at the Bronx Zoo in New York, has tested positive for the novel coronavirus after developing a dry cough, in what is believed to be the first known case of an animal infected with COVID-19 in the US, raising new questions about human-to-animal transmission of the deadly virus.

British Prime Minister Boris Johnson has been admitted to hospital for tests after he showed "persistent symptoms of coronavirus" even 10 days after testing positive for the disease.

 Italy on Sunday recorded its lowest daily death toll from the novel coronavirus in over two weeks and saw the number of critical care patients decline for the second day.

Spain saw its third consecutive daily decline in the number of people dying from the coronavirus pandemic as the country recorded another 674 deaths on Sunday, official figures showed.

A big shootout between rival drug gangs killed 19 people in the northern Mexico border state of Chihuahua, state prosecutors' office said Saturday.

President Donald Trump has said that he has requested Prime Minister Narendra Modi to release the amount of Hydroxychloroquine ordered by the United States after India last month banned the drugs for exports.

Britain on Saturday reported 708 more deaths from COVID-19 in a new daily high, as the number of confirmed cases rose to nearly 42,000.