Police were called to a demonstration on Anderson Street in Lilydale about 9.15am on Tuesday 31 August.
Witnesses said it appeared to be an anti-mask or anti-lockdown protest staged in the Coles car park, with many of those involved not wearing masks and disobeying current Covid-19 restrictions.
Lilydale police senior sergeant Ray White said this demonstration coincided with other demonstrations held at various locations on the same day.
He could not, however, confirm the locations of where these other demonstrations were held.
Multiple police vehicles and uniform members attended the incident, with a number of people being spoken to at about 11am. The group disbanded and left the site without incident.
No arrests were made and uniform officers at Lilydale police station are still investigating the matter.
