A three-month-old baby boy has become the fifth fatality following Friday's deadly rampage in the Melbourne CBD.
The infant was among five people left in a critical condition after a driver ploughed a car into crowds on busy Bourke Street.
A 10-year-old girl was also killed, along with two men and a woman who also died at the scene.
The driver is being treated in hospital for non-life-threatening injuries, after police rammed his car and shot him during a chase.
Described as a man in his 30s, he did a number of burnouts at the main intersection before driving his car into the shocked crowd.