Alexander Jones, 19, of Montmorency, with his sister Bridget (left). Ian and Sue Jones said they were proud of their children and thanked the bystanders who tried to help them when the wall collapsed. "[Alexander and Bridget] were always kind-hearted and respectful. They had a wide network of friends and yet were both very close to each other," the Jones family said in a statement. "They were both studying Arts at Melbourne University. Alexander was planning on studying law and perhaps going into politics. Bridget was considering becoming a teacher. "They loved sport, particularly tennis which they played since they were five, and all different genres of music.

Tributes have been left at a makeshift memorial. "We would like to thank Victoria Police for their kindness and the staff of The Royal Melbourne Hospital for their care of our daughter." Royal Melbourne Hospital intensive care specialist Thomas Rechnitzer said Ms Jones died from severe head injuries. People rush to the scene of the wall collapse. Credit: Broede Carmody and Jonathan Lian via Twitter "Despite every effort by multiple teams of dedicated doctors and nurses who did all they could for Bridget over the past three days, Bridget has died this morning as a result of severe head injuries," Dr Rechnitzer said.

A statement from Melbourne University, where both teenagers were students, said the university community was ''deeply saddened and distressed'' by the tragedy. "Our thoughts are with the Jones family and friends and with the other victims of the accident," the statement said. "We will continue to offer Alexander and Bridget's friends and those affected by the accident counselling and all other necessary support." The university will also offer to hold a memorial service for the family. Alexander and Bridget Jones were former students of Montmorency Secondary College. Mr Jones, known to friends as Zander, was the college captain in 2011.

In a statement on the school's website on Saturday, principal Allan Robinson described Mr Jones as an "inspirational and driving force in our Student Leadership Program". "Every member of our College community is in shock and is saddened by the tragic event that happened on Thursday," Mr Robinson said. "Our community and the family have lost Zander in tragic circumstances, and this is a loss of enormous proportions. "He was an incredible young man, thoroughly respected and admired by every student and member of staff." Friends of siblings gathered on Saturday at the site to leave tributes and comfort each other.

Dozens of teenage friends of Alexander Jones left two-minute noodles and the Melbourne University student's favourite chocolate bars as they comforted each other at the makeshift memorial. Other friends wrote tributes in chalk on the path where the brick wall collapsed, killing the siblings and a woman in her 30s. "We cannot let you go yet. We love you too much to say goodbye," one wrote in chalk. "To our gorgeous Panda & Bridgy for being the best buds out. You'll always be my wizard," wrote another. Mr Jones was known as Zander to some friends while others called him Panda and many stuffed pandas were brought to the wall tribute site.

A Facebook memorial page set up on Saturday carried condolences to the Jones family. WorkSafe and police are investigating the incident. The red brick wall, about 2.4 metres high, toppled onto the footpath on the western side of Swanston street. The collapsed segment was about 15 metres long. Locals walking past the site on Friday morning expressed their shock. One, Aruna Prasad, left a teddy bear and chocolate carrot in honour of the victims. "It just bought tears to my eyes because I'm a mother and a grandmother and I pass this way to go to the market all the time ... and it just hurt me because they are all young people," she said. "It's very sad." Others left flowers. Several residents described it as an accident waiting to happen.

Fitzroy resident Peter Coyle said he could not believe what had happened. "This place looks like Uluru," he said of the red dust that now covers the footpath where the brick wall crumbled to the ground. Police are appealing for any witnesses who saw the incident, or who were injured when the wall collapsed, to come forward. Police believe several other people suffered injuries but left the scene before speaking to authorities. "Our advice from the fire brigade is that there were other people injured but those people have left the scene through fear of remaining... in that they weren't entirely sure what the incident was, whether it was a wall collapsing or something on a larger scale," said Detective Senior Constable Brooke Manley from the Melbourne North Crime Investigation Unit.

"So they've cleared the area and we haven't been able to identify those people." She said other witnesses may be able to provide further information or footage documenting what occurred. "Other witnesses may have seen something else or be further able to assist us with not only witness accounts, but in this day and age with a lot of mobile phone devices and things like that, possibly footage," she said. Detective Manley described the incident as "horrendous" and said Victoria Police was working with WorkSafe to prepare a report for the coroner. Loading

"It's an unfortunate very tragic accident that's occurred on the eve of a long weekend. The families involved are devastated," she said.