Further deaths at New Zealand quarries are likely if hundreds of sites remain unregistered, the industry's health and safety council says.
The quarry industry wants the public's help to improve safety after four deaths in the sector so far this year.
Mining safety authorities want public help in locating unregistered quarries after four deaths at sites this year.
The quarry and mining sector is discovering dozens of contractors it never knew about.
People across New Zealand are being asked to help locate unregistered quarries which may pose some of the highest health and safety risks to industry workers.