The Ministry said while it was encouraging to see case numbers drop, it is not unexpected given there are usually lower testing and reporting levels over the weekend.
"It is also an important reminder to remain vigilant," the statement said.
"Please continue to follow public health advice to stay at home, away from school or work if you are feeling unwell.
"Another way to protect you and your whānau and friends is to get vaccinated if you haven't already done so. It is free and available for everyone aged five and over."
Of the 12 deaths reported, eight were from the Auckland region, two from MidCentral, one from Lakes and one from Hawke's Bay.
One was aged in their 40s, one in their 50s, three in their 60s, two in their 70s, two in their 80s and three were older than 90 years. Six were female and six were male.