The Ministry of Health has confirmed there is one new community case of Covid-19 in Christchurch, linked to a managed isolation case.
The Ministry of Health said the case was a staff member working at the managed isolation facility where a group of international fishing crew members had been staying.
Of the 237 mariners, 31 are infected with Covid-19.
The new community case was reported to the ministry on Monday afternoon.
The worker at the Sudima at Christchurch Airport returned a negative test on Thursday 29 October as part of routine testing for staff at the facility but developed symptoms on Saturday and took another test on Sunday which returned a positive result on Monday.
The person is now in isolation at home and has reported to be isolating since they developed symptoms.
More details about the case will be released at the 1pm media briefing on Tuesday.
The first of the international mariners were due to complete their managed isolation on Tuesday morning. Now they will have to stay on for at least another 24 hours as an additional precautionary measure, the ministry has said.
Those precautionary measures include additional tests - up to four tests for some individuals - and an already lengthened stay in managed isolation.