Westgate Divisional Response Unit officers continue to investigate an assault which occurred in Braybrook on Friday.
Investigators have been told a 15-year-old Sunshine West boy was approached by two males on Churchill Avenue about 3.30pm on 28 July.
The males said something to the boy before they produced machetes and threatened the victim.
The boy ran from the offenders and was chased for a short distance before the offenders gave up and ran off towards Sunshine Railway Station.
Investigators have made a number of enquires in relation to the matter but at this stage no arrests have been made.
Anyone who witnessed the incident or with footage is urged to contact Crime Stoppers on 1800 333 000 or make a confidential report at www.crimestoppersvic.com.au.
