New Zealand reported 24 new locally acquired coronavirus cases on Sunday, up from 20 on Saturday, showing an upturn after several days of lower numbers, as the country's largest city Auckland awaits to hear if its lockdown restrictions will ease.

All of the new cases have been reported in greater Auckland, a city of about 1.7 million people which has been in a full level 4 lockdown since mid-August.

The government of Prime Minister Jacinda Ardern is to announce on Monday whether the alert levels for Auckland and rest of the country will be changed, Reuters reports.

Until the weekend, New Zealand was on a path to eliminate the latest outbreak, which began in mid-August and has infected 1,050 people with the highly transmissible Delta variant of the coronavirus.

"Delta's tail is long and it is hard," Ardern told a briefing on Sunday.