Auckland Police have begun reviewing information and evidence as they enter the prosecution phase following Saturday's protest in Auckland.
Around 1000 anti-Government protesters dominated one section of a major Auckland motorway, filling the stretch of road with people instead of vehicles.
In a statement to Newshub on Sunday morning, Auckland Central Area Commander Inspector Graeme Anderson confirmed no one has yet been arrested, charged or summoned following Saturday's protest.
Police are working to identify those involved, he said, confirming that the prosecution phase has commenced.
"This will involve reviewing information and evidence to identify those involved in offending- including entering the motorway system on foot and other alleged driving-related offences."
Inspt Anderson wouldn't give a timeframe on how long it will take police to prosecute.
The Freedom and Right Coalition group, linked to Destiny Church leader Brian Tamaki, led the planned marches in Auckland, Wellington and Christchurch against "the declining quality of life and the incompetence of this Government".
Protesters on the motorway were seen carrying a large banner that said: "Labour must go".
The protest moved from Pukeawa/Auckland Domain to Newmarket and back again, blocking the Southern Motorway between Khyber Pass and Gillies Avenue.
Inspt Anderson signalled on Saturday that police plan to review their evidence "with a view to prosecution for being on the motorway".