New Zealand PM says Covid-19 outbreak will 'get worse' as Auckland cluster grows

Jacinda Ardern sound ominous tone, with expectation of a long lockdown for the country's biggest city

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Covid-19 may have been circulating in New Zealand's biggest city for weeks, the country's top health official has said, as 13 new community cases were confirmed - all linked to the four cases announced on Tuesday.

The prime minister, Jacinda Ardern, said the growing cluster in Auckland, now totalling 17, would get worse before it gets better" in the city of more than 1.4 million people.