Police have arrested three teenagers following an alleged affray in Melton West on Tuesday, January 16.
Officers were called to reports of a physical altercation between two groups at a shopping centre on High Street about 2.45pm.
One of the groups fled the scene into a nearby supermarket, where they were allegedly followed by the other group and threatened with a knife.
There were no injuries.
Three male teenagers fled the scene on foot an were arrested in the shopping centre car park.
A 16-year-old, a 15-year-old and a 14-year-old, all from Brookfield, are assisting police with their inquiries.
Officers allegedly seized a machete and a knife from the group.
It is believed the parties are known to each other.
Anyone with information can contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au.