Air New Zealand has stopped offering food and drinks on domestic flights following news that a woman who tested positive for Covid-19 works for an airline catering company.

There are three community Covid-19 cases in South Auckland - a mother, father and daughter from Papatoetoe.

The mother works at LSG Sky Chefs in Mangere, one of the world's largest airline catering providers.

Air New Zealand Chief Customer and Sales Officer Leanne Geraghty said a decision to suspend food and drinks for the next 24 hours was made out of "an abundance of caution" while the airline awaits more information from the Ministry of Health.

"For international flights we will be providing alternative catering options until more information is known."

Covid-19 Response Minister Chris Hipkins fronted a press conference in the Beehive with director-general of health Dr Ashley Bloomfield yesterday afternoon.

Hipkins revealed that the mother and daughter have returned tests which confirm they are "new and active".

Those test results came through on Saturday night and Hipkins said he was told about them the following morning.