Fifteen people remain in hospital after a man ran his car down Melbourne's Bourke Street mall.
Of those, two are in a critical condition, Victorian Premier Daniel Andrews said on Monday.
"We have grave fears for their health and wellbeing," he said.
So far, five people have died after a man deliberately drove into people in the crowded mall at lunchtime on on Friday.
"What occurred on Friday is not only a cause of great sadness, but it is a cause of legitimate and, I think, profound anger. All of us feel it," Mr Andrews said.
The man accused of the attack, Dimitrious "Jimmy" Gargasoulas, 26, is in hospital being treated for a gunshot wound and is likely to face multiple murder charges.
Victoria Police are still waiting to interview him.
The dead include three adults, a three-month-old baby and a 10-year-old girl.
© AAP 2017