Police are investigating the circumstances surrounding a house fire in Tallarook last night.
Emergency services were called to the Tallarook-Pyalong Road property following reports of a fire just after 11pm.
Concerns are held for the two occupants of the house who are currently unaccounted for.
A crime scene has been set up and detectives from the Arson Squad will attend the scene this morning with forensic specialists.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au