"We have identified a number of offenders who we are activity seeking. Those people are aware that they are wanted by Police and we encourage them to present themselves at a Western Bay of Plenty Police station at an early opportunity."
Mr Turner said police also now had a fence paling that is believed to have been used as a weapon in the assault.
"It was located a couple of days ago on a property in Merivale and the person who found it has since become aware through publicity of the possible significance and handed it in to police this morning."
He said despite the arrest the inquiry team remained focused on identifying further offenders involved in assaults on Mr Scullin and still wanted the community's assistance in identifying those who were responsible.
Police want to hear from anyone in the area on Saturday night or Sunday morning who has any information that may assist with this investigation.
Anyone with information should contact Tauranga Police on 07 577 4300.
Information can also be provided anonymously to the organisation Crimestoppers on 0800 555111.