New Zealand Post has confirmed a second worker at the Auckland Operations Centre in Highbrook has returned a positive Covid-19 test.

In a statement, NZ Post's Chief Operating Officer Mark Stewart said the employee was last at work on Friday and wasn't suffering from any symptoms at the time.

He said close contacts at work were currently being contacted.

NZ Post confirmed on Monday that another worker at the Highbrook centre had tested positive for Covid-19.

The service said it had been advised that there was a low risk of transferring the coronavirus through mail and parcels.