Extra Australian military personnel may be called in to ensure compliance with lockdown rules in Sydney, the New South Wales state government said on Thursday, as the highly infectious Delta coronavirus variant spreads into regional areas.

The move comes as Australia's capital city, Canberra, 260 km southwest of Sydney, announced a snap one-week lockdown from Thursday evening after reporting its first locally acquired case of Covid-19 in more than a year. Authorities later confirmed an additional three cases, all close contacts of the first case, an unnamed man.

Australia is battling to get on top of the fast-moving Delta strain that has plunged its two largest cities - Sydney and Melbourne - into hard lockdowns.

- Reuters -