A member of the public near the Glen Eden shops at the time of the arrest said he saw at least three police cars "zooming'' past him on Great North Road.
When he got closer to the block of shops, he saw two men on their knees in handcuffs, one with a police rifle being pointed at him.
"It was on the corner of West Coast Rd and Captain Scott Rd, probably outside the ASB bank.
"I saw a police man with a rifle pointing at one of the guys.''
The road had been closed off from Captain Scott Rd, up to Glenview Rd, he said.
A police helicopter was also seen flying over the area.
The onlooker said traffic was being diverted away from the area.
"At least three cars went zooming past me on Great North Rd on the way there.''
Nobody looked hurt, he said.
Police said the a man with Lolesio was detained while his identity was confirmed. This man is assisting police with enquiries and will be released without charge, the spokeswoman said.