Two Nelson schools will close tomorrow after two staff members have tested positive for Covid-19.

One of the cases is a staff member at Broadgreen Intermediate School, principal Pete Mitchener confirmed to Stuff.

A statement posted on the school's Facebook page says: 'The person was infectious at Broadgreen Intermediate from 23 November whilst at school.”

'A number of people are possibly ‘close contacts' and will need to get tested immediately, and self-isolate at home.”

Mitchener says they were notified of the case after school today, and they are following the Ministry of Education's official guidelines.

Contact tracing is the next step. Because the person is believed to have been infectious since the 23rd, there was 'quite a bit of time there”.

A similar message has been shared by Enner Glynn school tonight, saying their case has been infectious since November 29.

Both schools would be closed on Thursday, December 2, to allow for contact tracing.

The school's statements said parents would be contacted if any children were considered a close contact of either case.

A close contact is someone that has been identified to have been near the person that has tested positive for Covid-19.

The new cases were expected to be officially announced on Thursday.

Mitchener says the staff member from his school had been in contact, and the person had been very forthcoming with as much information as possible.

He says they will be communicating with the school community as fully as they can as they learn more through contact tracing.

Georgia Forrester/Stuff.