A stolen vehicle carrying radioactive equipment remains missing, and Christchurch police say the thieves could be putting themselves and the public at risk.
The white Ford Courier ute, which is clearly marked "Class 7 Radioactive'', was reported stolen from New Brighton on Tuesday.
The vehicle has a "density and moisture gauge'' that uses radioactive material.
Although the amount of radioactive material was relatively small and was encapsulated in stainless steel, if it was removed by unskilled operators, it would pose a potential public health and safety concern, said Inspector Marc Paynter of Police National Headquarters.
"No one should attempt to operate or disassemble the gauge, due to the adverse health effects if they do.