Port Phillip Crime Investigation Unit detectives are appealing for witnesses following a fire at a factory in South Melbourne overnight.
Police along with other emergency services were called to the Ferrars Street factory around midnight following reports the single-story structure was well alight.
Officers cordoned off the factory and managed traffic in the vicinity of the fire.
A crime scene guard has been placed on the property overnight and it is expected an arson chemist and detectives will revisit the scene this morning.
At this stage the fire is being treated as suspicious.
Investigators are appealing to anyone in the area at the time of the fire or anyone with dashcam who may have been driving near Buckhurst or Ferrars streets to come forward.
Police will be on scene in the morning to assist in the safe passage of families and students travelling to the nearby primary school.
Anyone with information is urged to call Crime Stoppers on 1800 333 000 or log onto www.crimestoppersvic.com.au.