A New Zealand charity working with homeless people has handed out sweets laced with potentially lethal doses of methamphetamine in its food parcels after they were donated by a member of the public.
Auckland City Mission on Wednesday said that staff had started to contact up to 400 people to track down parcels that could contain the sweets - which were solid blocks of methamphetamine enclosed in candy wrappers.
At least three people were treated in hospital after consuming them, New Zealand authorities said, but were later discharged.
Police said an investigation is under way and a number of people of people, including a pensioner, have already contacted authorities.
The amount of meth in each sweet was up to 300 times the level someone would usually take and could be lethal, according to the New Zealand Drug Foundation, which first tested the sweets.
Ben Birks Ang, a Foundation spokesperson, said disguising drugs as innocuous goods was a common cross-border smuggling technique and more of the candies might have been distributed throughout New Zealand.
The sweets had a high street value of NZ$1,000 (£467) per candy, which suggested the donation by an unknown member of the public was accidental rather than a deliberate attack, Birks Ang said.
The authorities' "initial perceptions" were that the episode was likely an importation scheme gone awry, said Detective Inspector Glenn Baldwin, but the nature and scale of the operation was unknown.
Officers have recovered 16 of the candies, but do not know how many are circulating, he said.
The City Missioner, Helen Robinson, said eight families, including at least one child, had reported consuming the contaminated candies since Tuesday.
The "revolting" taste meant most had immediately spat them out.
The charity's food bank only accepts donations of commercially produced food in sealed packaging, Ms Robinson said.
The pineapple sweets, stamped with the label of Malaysian brand Rinda, "appeared as such when they were donated," arriving in a retail-sized bag, she added.
Auckland City Mission was alerted by a food bank client who reported "funny-tasting" lollies.
Staff tasted some of the remaining sweets and immediately contacted the authorities.
One staff member was taken to hospital after sampling the sweet, Mr Baldwin said, adding that a child and a "young person" were also treated in hospital before being discharged.
The candies had been donated sometime in the past six weeks, Ms Robinson said. It was not clear how many had been distributed in that time and how many were made of methamphetamine.
Rinda said in a written statement the company had learned through New Zealand news reports that its candies "may have been misused" and would cooperate with authorities.
"We want to make it clear that Rinda Food Industries does not use or condone the use of any illegal drugs in our products," said General Manager Steven Teh.
Methamphetamine is a powerful, highly addictive stimulant that affects the central nervous system. It takes the form of a white, odorless, bitter-tasting crystalline powder that easily dissolves in water or alcohol.
