Police are appealing for help identifying a man and a woman whom they believe could help with an investigation into a suspicious grassfire in Greenvale late last year.
Hume Crime Investigation Unit detectives are investigating a fire Luster Circuit on Monday, December 28.
Emergency services were called to the blaze in grassland opposite homes about 3.30pm.
Witnesses have told police that a man and woman were seen standing in the area where the grassfire was lit prior to the blaze.
The fire was extinguished before it could spread to residential homes.
Police have released images of a man and woman they believe can assist with their enquiries.
Any further witnesses or anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au.