National's party leader Judith Collins and health spokesperson Shane Reti are holding a media conference.

They are expected to speak from 3pm.

The pair are speaking from the Legislative Council Chamber at Parliament.

Their statement comes after four new cases of Covid-19 in the community were identified last night, with Prime Minister Jacinda Ardern and Director-General of Health Ashley Bloomfield announcing increased Covid-19 alert levels across the country.

The four cases were members of the same family, and Ardern revealed this morning that one of them had travelled to Rotorua while symptomatic.

The Auckland region moved to level 3 at midday today, with the rest of New Zealand moving to level 2 simultaneously. The increased levels will remain for three days until midday Friday, when alert levels will be reassessed.

• If you have symptoms of the coronavirus, call the NZ Covid-19 Healthline on 0800 358 5453 (+64 9 358 5453 for international SIMs) or call your GP - don't show up at a medical centre

-RNZ