A group of teens allegedly fled after an altercation with a fellow shopper at Chirnside Park Shopping Centre on Wednesday.
Victoria Police confirmed officers responded to reports of an affray on 16 July.
“It is understood a group of youths assaulted a man outside a shopping centre on Maroondah Highway about 4.10pm,” a spokesperson said.
7News Melbourne reported that witnesses saw a group of youths get into a violent altercation with a man in his thirties outside Kmart.
This forced the retail giant to go into lockdown as a precaution, with video footage showing the roller doors closed and people huddled outside the shop.
The police spokesperson said the male victim declined medical assistance at the scene.
The group fled the scene prior to police arrival and the investigation remains ongoing.
Anyone who witnessed the incident, has CCTV/dashcam footage or any other information that could assist police is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppers.vic.com.au.