Dhaka, Nov. 28 -- Health officials in New South Wales, the most populous state, said both passengers had arrived in the state capital, Sydney, on Saturday evening and tested positive for Covid-19 late that night, before genome sequencing confirmed the Omicron variant on Sunday.

Australia joins Britain, Germany and Italy in detecting Omicron cases over the weekend as more nations imposed restrictions on travel from southern Africa.

Both people were asymptomatic, fully vaccinated and in quarantine, said NSW Health. Another 12 passengers from southern Africa were also in 14 days of hotel quarantine, while around 260 other passengers and aircrew have been directed to isolate.

"Close contacts will be contacted regularly, and compliance chec...