Australian states and territories have begun imposing border restrictions after 28 Covid-19 cases were detected from a cluster on Sydney's northern beaches, with fears the number of infections will rise.
Announcing 10 new cases of the virus, New South Wales (NSW) state Premier Gladys Berejiklian said: "Everyone in greater Sydney needs to be on high alert." Health authorities fear the cluster may have spread to other areas of Sydney, Australia's most populous city, as they have yet to determine the source of the infections.
NSW has urged about a quarter of a million residents in the affected suburbs of Sydney to stay home for three days. NSW Chief Health Officer Kerry Chant said: "My anxiety is we have not found the direct transmission route