Inspector Adam Pyne said the arrest followed an indecent assault in Goodwood Heights last week. He said charges were being considered.
In a previous statement, police said a stranger offered to walk a child home before indecently assaulting her in bushes near Aronia Park in Goodwood Heights at about 8pm on October 25.
“This man has then indecently assaulted her in nearby bushes. The child has screamed for help, and the man fled the scene,” police said.
On Wednesday night police said they were in the “early stages of an investigation”.
“Our primary intention is to identify and locate the person believed responsible and we are following several lines of inquiry,” a police spokesperson said.
“We continue to appeal for information from people who were in the Aronia Park area between 6pm and 8pm on Friday.”
Police have also asked anyone with CCTV footage or anyone driving in that area who may have dashcam footage to contact police.
“Please reference job number 241025/7415. Information can also be provided anonymously via Crime Stoppers on 0800 555 111.”
Manurewa-Papakura Ward councillor Daniel Newman called the crime “beyond despicable” and said the community was “outraged”.
Newman said he was “very disappointed” schools had not been warned of the risk so they could be extra vigilant and inform their communities.
A primary school and preschool 200m from the location of the attack say they are now on high alert but were surprised police did not warn them about a potential predator being on the loose.
SEXUAL HARM
Where to get help:
If it’s an emergency and you feel that you or someone else is at risk, call 111.
If you’ve ever experienced sexual assault or abuse and need to talk to someone, contact Safe to Talk confidentially, any time 24/7: