The Omicron cluster has grown by 15 new cases today, with the Ministry of Health revealing a string of new locations of interest connected to cases of the variant.

A total of 105 new community cases of Covid-19 were reported, which accounts for both Omicron and Delta variants of the virus, as well as cases where the variant is not known.

The ministry warned that as New Zealand saw more Omicron cases, an increase in the total number of daily community cases was expected.

Only four people are in hospital with the virus. The current age of those in hospital with Covid-19 is 66.

Today's new community cases are in Auckland, Waikato, Tairawhiti, Bay of Plenty, Lakes, Hawke's Bay, MidCentral, Nelson Tasman and Canterbury. One case in Northland and one in Bay of Plenty would officially be added to tomorrow's case numbers.

A focus for Bay of Plenty DHB Public Health staff is an exposure at the Polo in the Bay event held at on Trustpower Baypark stadium between 1pm and 6.15pm on (Saturday) 22 January. The event was attended by a large number of people, including cases that are suspected to be Omicron.

In Northland, one person based in Whangārei, and who is a household contact of a previous case, has tested positive for Covid-19.