President Donald Trump demanded on Sunday that his Democratic rival Joe Biden take a drug test for their first debate, which will bring them face to face for the first time in the volatile US presidential campaign.

Sydney's popular Sculpture By The Sea exhibition has been postponed with organisers concerned about proximity of attendees during COVID-19.

In the latest flashpoint in the four decade-conflict, both Armenia and Azerbaijan have mobilised military units over the disputed Nagorno-Karabakh region.

If Switzerland unilaterally voids the free movement accord, a "guillotine" clause will come into force to freeze the entire package of Swiss-EU deals, including on trade.

Both sides in Yemen's war have agreed to exchange more than 1,000 prisoners.

The Victorian government has further eased COVID-19 lockdown measures, with Melbourne's nightly curfew lifted and thousands of people allowed to return to work.

The federal budget will include more financial support for airlines to keep key domestic and regional routes running, after an industry slump due to the coronavirus, the deputy prime minister says.

Exclusive: Melbourne lawyer, human rights advocate and former refugee Nyadol Nyuon has been appointed the new chair of Australia’s migrant and refugee women’s coalition, Harmony Alliance.

Victoria has had three more coronavirus deaths, taking the state toll to 787 and the national figure to 875, but the number of new cases dropped to just five.