An exit plan is being developed for international mariners in managed isolation in Christchurch.
The first intake of 240 crew members was due to leave a managed isolation facility on Tuesday after dozens of them who tested positive completed their stand-down.
This is now on hold, however, after health officials have confirmed a worker has caught the virus where they are staying at the Sudima Christchurch Airport hotel.
A second worker has since been confirmed as testing positive for Covid-19.