Donald Trump claimed he has seen evidence the new coronavirus originated in a Chinese lab, as he threatened tariffs on Beijing over its role in the global pandemic.

US President Donald Trump attacked China once again over its handling of the coronavirus pandemic
US President Donald Trump attacked China once again over its handling of the coronavirus pandemic AFP / MANDEL NGAN

The US president's assertion was immediately undermined by his intelligence chief and by his top diplomat, who said: "We don't know precisely where it began."

Lockdowns that have crippled the global economy for weeks continued to ease, with South Africa allowing some industries to reopen from Friday, joining parts of Europe and some US states that have begun to emerge in the last few days.

Weekly unemployment benefit claims and periods of recession in the US since January 1970
Weekly unemployment benefit claims and periods of recession in the US since January 1970 AFP / Gillian HANDYSIDE

But the good news was tempered by data showing a further haemorrhaging of jobs, with 30 million Americans newly unemployed since lockdown began, as businesses lose customers.

Underlining the slump in consumer demand, Irish airline Ryanair said it was slashing 3,000 positions, forecasting passenger numbers would not recover until mid-2022.

An aerial view shows the P4 laboratory at the Wuhan Institute of Virology in the Chinese city of Wuhan -- US President Donald Trump said he had seen evidence pointing to the lab as the source of the novel coronavirus
An aerial view shows the P4 laboratory at the Wuhan Institute of Virology in the Chinese city of Wuhan -- US President Donald Trump said he had seen evidence pointing to the lab as the source of the novel coronavirus AFP / Hector RETAMAL

While death rates slowed in most of Europe, the global toll from the pandemic has now topped 230,000.

A woman walks in the schoolyard of an elementary school in Berlin where circles have been painted on the ground to mark the recommended distance, in preparation of the return of some pupils from early May 2020
A woman walks in the schoolyard of an elementary school in Berlin where circles have been painted on the ground to mark the recommended distance, in preparation of the return of some pupils from early May 2020 AFP / Tobias Schwarz

Scientists believe the killer virus jumped from animals to humans, emerging in China late last year, possibly from a market in Wuhan selling exotic animals for meat.

But speculation has swirled about a top-secret lab, reinforced by internet rumours and right-wing shock jocks -- and increasingly taken up by the US president.

Health workers celebrate as they watch a 16-year-old patient who recovered from COVID-19 leave hospital in Santa Tecla, El Salvador
Health workers celebrate as they watch a 16-year-old patient who recovered from COVID-19 leave hospital in Santa Tecla, El Salvador AFP / Yuri CORTEZ

Asked if he had seen anything giving him a high degree of confidence that the Wuhan Institute of Virology was the source of the outbreak, Trump replied, "Yes, I have."

He refused to give details.

Lagos State Environmental Protection Agency agents train leaders of various unions on measures to curb the spread of COVID-19
Lagos State Environmental Protection Agency agents train leaders of various unions on measures to curb the spread of COVID-19 AFP / PIUS UTOMI EKPEI

However, Secretary of State Mike Pompeo indicated he had not seen definitive evidence.

"We don't know precisely where it began," he said.

Performance artists put on a show in a window of a house in the Liebig Steet in Berlin's Friedrichshain district
Performance artists put on a show in a window of a house in the Liebig Steet in Berlin's Friedrichshain district AFP / Odd ANDERSEN

"We don't know if it came from the Wuhan Institute of Virology. We don't know if it emanated from the wet market or yet some other place. We don't know those answers."

A physiotherapist gives a high five to a patient at the "middle care" unit for the COVID-19 infected patients at the Erasme Hospital in Brussels
A physiotherapist gives a high five to a patient at the "middle care" unit for the COVID-19 infected patients at the Erasme Hospital in Brussels AFP / Kenzo TRIBOUILLARD

The Office of the Director of National Intelligence said analysts "will continue to rigorously examine emerging information and intelligence to determine" the origin of the outbreak.

Beijing has denied the lab was the source of the virus.

Penguins in Singapore zoo are regularly being taken out for walks around the deserted zoo during the city-state's partial coronavirus lockdown
Penguins in Singapore zoo are regularly being taken out for walks around the deserted zoo during the city-state's partial coronavirus lockdown Handout / Wildlife Reserves Singapore /

Last month foreign ministry spokesman Zhao Lijian said: "(World Health Organization) officials have repeatedly stated that there is no single evidence that the new coronavirus was produced in a laboratory."

"Many well-known medical experts in the world also believe that the so-called laboratory leak hypothesis has no scientific basis,"

Elite Indonesian navy frogmen wearing protective gear keep watch at a port in Jakarta as over 300 Indonesian crewmembers of the Explorer Dream cruise ship are brought ashore for testing and quarantine amid the COVID-19 pandemic
Elite Indonesian navy frogmen wearing protective gear keep watch at a port in Jakarta as over 300 Indonesian crewmembers of the Explorer Dream cruise ship are brought ashore for testing and quarantine amid the COVID-19 pandemic AFP / ADEK BERRY

Trump is making Beijing's handling of the outbreak a major issue for his November re-election campaign.

When asked about reports that he could cancel US debt obligations to China, Trump said he could "do it differently" and act in "more of a forthright manner".

A staff member wearing a face shield points instructions at a bus station in Wuhan in China's central Hubei province
A staff member wearing a face shield points instructions at a bus station in Wuhan in China's central Hubei province AFP / STR

"I could do the same thing but even for more money, just putting on tariffs," he said.

Armed protestors try to enter the chamber of the Michigan State Capitol in Lansing during a rally organized by Michigan United for Liberty demanding the reopening of businesses
Armed protestors try to enter the chamber of the Michigan State Capitol in Lansing during a rally organized by Michigan United for Liberty demanding the reopening of businesses AFP / JEFF KOWALSKY
The hospital ship USNS Comfort passes the Statue of Liberty as its departs New York City
The hospital ship USNS Comfort passes the Statue of Liberty as its departs New York City AFP / Angela Weiss

The latest jobless claims by another 3.84 million Americans mean roughly nine percent of the US population have filed for unemployment benefits in the past six weeks.

The depressing US data compounded a tough message from European Central Bank chief Christine Lagarde.

"The euro area is facing an economic contraction of a magnitude and speed that are unprecedented in peacetime," she warned.

ECB economists expect output in the 19-nation currency club to shrink by "five to 12 percent" this year, she added.

The coronavirus has infected at least 3.2 million people so far, with Russia's Prime Minister Mikhail Mishustin becoming the latest high-profile figure to test positive as his country's caseload surged past 100,000.

But there was some reason for cheer.

Germany accelerated plans to start lifting its anti-virus lockdown, preparing gradually to ease curbs on public life and reopen religious institutions, museums and zoos -- having restarted shopping last week.

"It remains absolutely important that we stay disciplined," said Chancellor Angela Merkel.

Italy, once the world centre of the outbreak, said it was hoping to reopen two major airports next week, but would move slowly.

"We cannot allow the efforts made to be in vain because of rashness at this delicate stage," Prime Minister Giuseppe Conte said.

And British Prime Minister Boris Johnson, who himself battled COVID-19, said his country -- which has the world's third-highest death toll, behind the US and Italy -- would publish a roadmap next week on easing restrictions.

Malaysia said Friday it would re-open for business next week, while Australia's government said it could begin easing restrictions soon.

"We need to restart our economy. We need to restart our society. We can't keep Australia under the doona," Prime Minister Scott Morrison said, using a local term for a duvet.

The stay-at-home rules have left zoo animals around the world short of visitors.

In Singapore, keepers have taken a colony of African penguins to the children's playground to give the attention-starved birds a bit of stimulation.

And in Tokyo, aquarium bosses were asking members of the public to Facetime lonely eels, fearful that the shy creatures are forgetting what humans look like.

"Garden eels in particular disappear into the sand and hide every time the keepers pass by," said Sumida Aquarium. "Could you show your face to our garden eels from your home?"

"Right now, watching news on TV can really be scary, but in this game, it's just as if nothing is happening, it's all quiet and peaceful," said Kanae Miya.