A large convoy of gang members arrived at Manukau Memorial Gardens in Auckland on Monday as a funeral for Killer Beez member Hone Kay-Selwyn got underway.
Patched members of the Killer Beez, Hells Angels and Head Hunters were in attendance, a Newshub reporter at the scene said.
The convoy was seen rolling in on motorbikes, with members filmed doing burnouts in public.
There was a very large police presence but officers were staying clear of the actual funeral area, sticking to the entrance.
Later Monday, police said four people had been arrested.
Police earlier said Kay-Selwyn's death was not suspicious, after his body was found in Taupō last Tuesday.
The death comes after a manhunt for the 31-year-old who was accused of shooting 33-year-old Robert Sidney Horne dead on Ponsonby Rd in Auckland last weekend.
"Today, police monitored funeral proceedings between the Ōtara and Manukau Memorial Garden areas," Inspector Rakana Cook said.
"This included a significant Police presence on the grounds at the cemetery, with some support from the Police Air Support Unit."
He also said a checkpoint was established at the Manukau Memorial Gardens as part of Monday's operation.
"There are no significant issues to report this afternoon and those gathered have dispersed," Insp Cook said.
"Four arrests were made for judicial matters, with four motorcycles impounded for prior driving related offending. Our expectations on the acceptable standard of behaviour have not changed in the last four days."
Police earlier on Monday confirmed they had been monitoring funeral proceedings for Kay-Selwyn as his body was moved back to Auckland.
"Today, his body is expected to travel from the Ōtara area to the Manukau Memorial Gardens," a police statement said.
"Police are deploying a number of resources to monitor proceedings today, including around the route and at the Manukau Memorial Gardens.
Police said the public should expect there to be movements of gang members in parts of Auckland on Monday, but asked anyone concerned about any activity or behaviour to report this to police so that appropriate action can be taken.
"We continue to advise people that if the incident is happening now, please call 111."
Any other matters can be reported by calling 105 or online.