Trading in all NZX-listed dairy companies has been halted by the stock market operator, as police announce a threat to poison infant and other formula.
Police said in a statement on Tuesday that anonymous letters were received by Fonterra and Federated Farmers in November 2014, along with small packages of milk powder which have since tested positive for a concentrated 1080 poison.
Units in Fonterra Shareholders Fund, and shares of A2 Milk Company and Synlait Milk have all been placed in a trading halt.
The NZX Dairy Futures and Options market has also been halted.
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