Victoria's bail laws will be changed in the wake of the Bourke St car rampage, as four people continue to fight for their lives in hospital.
Police are waiting to interview Dimitrious "Jimmy" Gargasoulas, who's accused of driving into crowds in the mall on Friday, resulting in the deaths of five.
He was bailed against the wishes of Victoria Police five days before the attack, prompting Premier Daniel Andrews on Monday to announce changes to the bail system.
"Additional magistrates will come online very soon to give police an option to refer a bail application to a magistrate rather than a bail justice, particularly for serious matters," he said on Monday.
The entire bail system will also be reviewed and the state government wants ideas for new laws within 10 weeks.
Gargasoulas, 26, is recovering from surgery after being shot in the arm following a police chase and Chief Commissioner Graham Ashton said police hoped to interview him on Monday.
Gargasoulas is expected to face multiple murder charges.
Ten-year-old Thalia Hakin, a three-month-old baby, Jess Mudie, 22, Matthew Si, 33, and a 25-year-old man have died, and more than 30 others were injured in the attack.
Fifteen people remain in hospital.
"We've still got fears for another four that are critically injured. There are real fears for their long term health," Mr Ashton told 3AW.
The Jewish community in St Kilda East held prayers for Thalia and all the other victims on Sunday night, and prayed for a speedy recovery for the injured.
Federal MP Michael Danby and local state MP David Southwick told reporters the community was deeply shocked by the tragedy.
Thalia should have been returning to Beth Rivkah Ladies College in a few weeks.
"I think all Victorians can identify... with a girl who was going into grade five, her life all in front of her, robbed by some crazed person," Mr Danby said.
Mr Si was a devoted husband and a loving father, brother and son, his wife Melinda said in a statement.
They had just finished lunch together in the city, and parted to go to their respective offices, when he was struck and killed.
"The family would like to thank everyone who helped Matt at the scene and did their best to save him," Ms Si says.
Ms Mudie's family wrote a tribute letter that was released to media: "To our dearest and most badass daughter and sister, Jess. You are always up to do everything and are such bright bubble of joy. "
Gargasoulas had been driving erratically around Melbourne after allegedly stabbing his brother, who is also in hospital, much earlier that morning.
A tax deductible fund has been set up to help the families of victims who died as a result of the attack, with the Victorian and federal governments putting in $100,000 each.
A public vigil is being planned for Monday night at Federation Square.
