Tests have been unable to determine what substance was sprayed at police in an incident during the occupation of Parliament grounds, a police boss says.
Police had the substance thrown at them on 22 February. Photo: RNZ / Angus Dreaver
Three officers involved in policing the Parliament protest activity on Molesworth Street on 22 February were treated at the scene by paramedics and later in hospital after a liquid substance was thrown at them.
Wellington District Commander Corrie Parnell said two laboratories analysed material from the glo-vests worn by the officers.
However, the tests showed no positive results for any form of chemical substance that could have caused the burning sensation the officers experienced, he said in a statement.
"At the scene, all members were heavily washed down with a water and baking soda solution which likely washed away any evidence or form of a chemical substance."
Parnell said several liquid substances were at the site, including pepper spray, at the time the substance was thrown at police.
Police were continuing to investigate the incident and other possible criminal behaviour related to the protest.
The scene in the grounds of Parliament on 22 February. Photo: RNZ / Angus Dreaver