Classmates and teachers linked to the latest Covid cases at Papatoetoe High School are being retested

Two siblings who attend the school and a household contact tested positive for the virus yesterday.

One of them was a classmate of the original infected Year Nine student.

Papatoetoe High School won't reopen until Monday - but only to students and staff who've returned a negative test result.

Director-General of Heath Dr Ashley Bloomfield says the students began getting tested last Wednesday.

He says they're comfortable with the negative results they do have -- but if anyone develops symptoms or wants to be retested, they can do so over the weekend.

Any close contacts of those infected will stay in isolation for 14 days and have another test.