St Johns ambulance workers say they're still in shock over a white powder scare which left two staffers in hospital.
The powder was discovered inside an envelope at the Surry Hills office.
Investigators have tested the substance and it seems it's a detergent, but the organisation says it can't understand why it was targeted.
Earlier ...
More police have arrived at the St Johns Ambulance office in Surry Hills, after a package of white powder was discovered.
Officers have just taken two bags containing evidence from the St Johns Ambulance building on Hunt Street.
Earlier the fire brigade hazmat team removed a package from the building.
Several more police including several detectives have arrived.
It’s still not known what the powder was and whether it arrived in the mail or was planted inside.
Video: Yasmin Bright