A suspicious fire has broken out in a factory in Spotswood in the early hours of this morning.

Emergency services were called out to the Hudson Road address just after 2:30am, where crews discovered the blaze spreading to neighbouring factories.

Speaking on 3AW Breakfast, Victoria Police Media Officer John McLaughlin said a total of nine people where evacuated from the premises.

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It is believed that potential offenders where seen fleeing the scene in an unknown direction.

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