A third of National's MPs are confirmed to be in isolation, along with six Labour MPs and Rawiri Waititi from Te Pāti Māori.
In a statement this afternoon, National confirmed that Stuart Smith and Mark Mitchell were positive cases, along with leader Christopher Luxon and Finance Spokesperson Simon Bridges.
Deputy leader Nicola Willis this morning said there were 11 of the party's 33 MPs currently in isolation. She defended Luxon's approach.
Meanwhile three Labour MPs were confirmed cases - including David Parker, Poto Williams and Anahila Kanongataá-Suisuiki.
A spokesperson said three more Labour MPs were isolating as household contacts and were continuing to work from isolation.
Māori Party co-leader Rawiri Waititi was also in isolation.
ACT and the Green Party said none of their MPs were in isolation.