Police say officers are continuing to monitor the movements of Head Hunters gang members leaving Auckland as they make their way to Foxton for a funeral procession.
It comes after large groups of gang members were seen congregating on bikes in Auckland on Saturday morning.
Assistant Commissioner Mike Johnson said many police officers were deployed to checkpoints on Ellerslie's Marua Rd on Saturday morning, prior to the group leaving Auckland.
"Several infringement notices were issued and one person failed an alcohol breath screening test."
An Eagle helicopter is being used to monitor movements along the roads and to provide support to other police districts, Johnson said.
"Our expectations on behaviour have been made clear and any unlawful or unsafe activity will not be tolerated."
Police said given the volume of traffic heading south, motorists should be aware of possible disruptions in parts of their journey.
Extra staff are supporting the operation "both on the roads and for its duration" and are focused on mitigating any disruptions, Johnson said.
To report any matters to the police, contact 105 or make a report online by going to https://www.police.govt.nz/use-105.
