Police are aware of plans for a protest march, organised by SkyPath Trust, across the Harbour Bridge on Sunday May 26.
Any pedestrian access across the Harbour Bridge requires the approval from the NZ Transport Agency.
Police have been in discussions with NZTA and to date no approval has been given for this event, says Inspector Scott Webb, Road Policing Manager for Tamaki Makaurau.
"Without the relevant authorisation, any pedestrian crossing of the Harbour Bridge is unlawful.
"Anyone who does walk, march or cycle as indicated, without prior approval, will be doing so unlawfully, while also posing serious safety risks to themselves, the public and other motorists.
"The priority for Police is to ensure the safety of the public and road users.
"Should an attempt be made to unlawfully cross the bridge at any time, Police will have no alternative but to take appropriate action."