A man has been shot dead by police and a woman is critically injured after a “frenzied” stabbing attack in Melbourne’s north west.
Four men have been arrested over the stabbing death of Thomas Tran in Melbourneâ€™s southeast in June.
Mr Tran, 20, from Springvale, was killed after leaving a gym in Oakleigh about 7.55pm on June 29.
Homicide Squad detectives swooped on three teenagers and a man during raids of multiple properties in Dandenong and Dandenong South on Saturday morning.
Two 18-year-old men and a 19-year-old man from Dandenong, as well as a 20-year-old man from Dandenong South were arrested and are assisting police with their investigation.
No charges have been laid yet.
Police initially arrested a teenage boy and three men after they were called to Atherton St near Eaton Mall on June 29 following reports of a fight between a group of people.
A 15-year-old, two 19-year-old men from Lynbrook and Lyndhurst and a 20-year-old Dandenong man were questioned by Homicide Squad detectives but released a short time later.
After the horrific attack, Mr Tranâ€™s parents broke down in tears as they left flowers and lit incense just metres from where their son was stabbed to death.
His girlfriend, Trish Nguyen, told reporters at the scene that day he made her â€œlaugh every secondâ€.
â€œHe really cared about people and he really loved everyone that was in his life,â€ she said.
â€œHe put everyone before him and thatâ€™s what I loved the most about him.â€
Mr Tranâ€™s former school, Salesian College in Chadstone, had also paid tribute to â€œa wonderful young man with so much potentialâ€.
Police said the investigation was ongoing and anyone with information was urged to contact Crime Stoppers on 1800 333 000.