Updated at 9:05 am on 20 November 2012
People are being warned to steer clear of shellfish from parts of the North Island or risk getting sick.
High levels of paralytic shellfish poison have been found from Taranaki to Dargaville and in the Bay of Plenty.
The toxin contaminates the gut of shellfish and is not removed by cooking.
The warning covers the popular Manukau and Kaipara harbours.
Simon Baker, the Auckland Regional Medical Officer of Health, says if eaten, the toxin can cause paralysis and breathing problems.
Dr Baker says it is not known when it will be safe to collect shellfish again.
Listen to more on Morning Report
Copyright © 2012, Radio New Zealand
Audio is categorised based on the frequency of the programme it was heard in. Click on the headings below to access the programmes. For the most recently published audio, go to the latest audio page.
Streams are in Windows Media format. Mac and Linux users may need to install additional software. Get help with audio
A selection of music interviews, reviews, videos, concerts, sessions, and performances.
Downloads and podcasts are available for selected programmes. Our podcast page has a complete list of feeds.
Help on using online audio: formats, software, podcasts, downloading, and troubleshooting.