Two people have been taken to hospital after an ammonia leak at a freezing works north of Oamaru on Friday night.
Fire and Emergency say they arrived to the scene at 10:18pm.
A cloud of ammonia was found inside the building and evacuations were carried out.
St John says two people were taken to Oamaru Hospital. One was in a minor condition, another in a moderate condition.
Three fire crews were sent out, along with a hazardous material command unit.
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Firefighters liaised with freezing works management staff until the leak was contained.
Police and ambulance were also in attendance.
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