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A motive for the attack has not been identified, but police today said that the driver was a 32-year-old Australian citizen of Afghan origin who has a history of mental health issues and drug use.
They added that it is not believed to be a terror attack and want people to go about their lives in the normal way.
A second man, 24, was arrested at the scene because he was filming the incident and was found to have a number of knives on him.
Victoria Police chief Shane Patton said they had not established any relationship between the two men.