A man in a car went on a rampage in Melbourne's CBD on Friday afternoon, killing five people and injuring at least 30. Here's what we know about the victims, the perpetrator and the events leading up to the tragedy.
Three people, a man and woman in their 30s and a small child, died immediately following the rampage.
On Friday evening, police confirmed a fourth person had died.
On Saturday evening, just before 11pm, police confirmed a fifth person, a three-month-old baby, had died.
At least five people have suffered life threatening injuries, and a further 23 people remain in hospital, Fairfax reports.
Five people are being treated for injuries at Melbourne's St Vincent's hospital: three women in their 30s with facial wounds and fractures, and two men with leg fractures.
A three-month-old baby with life threatening injuries was taken to hospital by police on Friday because they could not wait for an ambulance. None of the victims have been formally identified.
The driver is also in hospital with non-life threatening injuries after being shot in the arm by police.
The driver has been identified as 26-year-old James "Jimmy" Gargasoulas.
Police say Gargasoulas was involved in a family violence incident in which a person was stabbed in Melbourne's suburbs earlier on Friday morning.
Following this, police allege he took a woman hostage in a car that did not belong to him, before leading police on a high speed pursuit. The hostage managed to escape the car on Melbourne's Bolte Bridge.
Police made a number of attempts to arrest Gargasoulos throughout the morning.
Earlier on Friday, Gargasoulas was seen poking his head out of his car and waving in the background of a Channel 9 news report.
Police called off their pursuit of Gargasoulas out of concern for public safety before he made his way into the Melbourne CBD at around 1.30 on Friday afternoon.
"It was a rolling situation, where we were looking to intercept him on a number of occasions. The officers are trying to make decisions at the time about preventing loss of human life," Victoria police chief Graham Ashton said of the decision to call off the pursuit at a press conference on Saturday morning.
Shortly after, Gargasoulas performed burnouts in front of Flinders Street Station before he mounted the curb in the vicinity of Bourke and Queens streets and ran down dozens of pedestrians.
Gargasoulas has a history of mental health issues and is known to police, but has no links to terror or criminal organisations. Police have ruled out terror as a motive.
Police have confirmed Gargasoulas had recently been charged and subsequently released on bail days before the rampage. He was due in court on Friday.
“An extensive family violence history was involved… he had mental health and drug-related issues in the background of this particular person,” Victorian police commissioner Graham Ashton said on Friday afternoon.
“He has been coming to our attention more recently over recent days in relation to assaults, family violence-related assaults, and also was charged by us over the course of last weekend.”
Victorian premier Daniel Andrews has pledged a review of Victorian bail laws following the incident.
On Saturday morning, Andrews announced a memorial will be set up near the site of the attack, and encouraged people to lay flowers there.
"As we've seen with other tragic acts, both here and abroad, Victorians will come together and show that mark of respect, that act of kindness, a small loving act in memory of those who have died, in memory of those who will forever be changed by the terrible things we witnessed here yesterday," he said.
"One way in which we can all show our support is to spend a moment at what I'm sure will be a rapidly-growing tribute to all of those who have been so senselessly taken from us, and those who have been forever changed by this terrible, evil crime."
UPDATE
A three-month-old boy died on Saturday night after being injured in the attack, bringing the death toll to five.