, the ABC has reported.
According to the ABC a number of postal workers were overcome with sore throats, coughing and wheezing after examining the package about 7.30pm.
Hazmat, fire and rescue teams, police and paramedics were called to the scene.
About 150 workers were evacuated from the centre as specialists wearing breathing apparatus examined the parcel.
But what was feared to be a chemical attack turned out to be a pack of particularly spice curry powder.
Three staff were given medical treatment at the scene.
Police told the ABC that the incident was not suspicious and curry powder is not on Australia Post's dangerous goods list.
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