The discovery of dead shellfish at the popular sandspit and estuary in Ngunguru has led to signs being put up against the collecting of pipi and tuatua - a move welcomed by a local kaumatua.
A multi-agency investigation into the dying and dead tuatua found on the seaward side of the Ngunguru sandspit and pipi within the estuary is under way, including tests done by the Northland Regional Council on dead shellfish.
The Ministry of Primary Industries (MPI) is leading the investigation and is being assisted by the NRC, the National Institute for Water and Atmospheric Research (Niwa), and the Northland District Health Board.
The exact number of dead shellfish is not known at this stage.
MPI is testing samples collected by NRC staff on Friday to try to understand what might have caused the deaths and to rule out any biosecurity risk.