Mid North Coast Police District officers received reports that the woman had failed to isolate after a positive COVID-19 test, and was travelling from Strathfield to Coffs Harbour with her three children.

"Officers stopped the train at Kempsey about 10.40pm to remove the woman and her children from the train, before they were taken by NSW Ambulance paramedics to a special health hotel at Port Macquarie, where they will quarantine," NSW police said.

"Following further inquiries, the 17 passengers and six crew on board at the time were also taken to the quarantine hotel, where they remain under the care of NSW Health."

Other passengers who boarded the train at stations previously in the journey are being contacted by NSW Health, police said.

"The officers involved are being managed in line with requirements in the Public Health Orders.

"Inquiries are being conducted into the incident, including potential breaches of the public health order."

Hunter update September 10

There were 13 new cases across the Hunter New England Health District to 8pm last night. This brings the total number of cases in the district to 275 since August 5, 2021.

Today's case in Singleton is the first in that local government area. The person was infectious in the community before their test result and investigations are ongoing.

Our COVID-19 news articles relating to public health and safety are free for anyone to access. However, we depend on subscription revenue to support our journalism. If you are able, please subscribe here. If you are already a subscriber, thank you for your support.

Our journalists work hard to provide local, up-to-date news to the community. This is how you can continue to access our trusted content: