Terrifying footage has emerged of the moment a man lunged at police with a knife in Melbourne's Bourke Street on Friday afternoon.
Video posted to Twitter and broadcast on television showed a man repeatedly swinging an object at two police officers in the downtown area of the city. A Reuters witness said that the city centre was closed off by police and that dozens of officers were patrolling.
Witnesses say they saw the man drive a truck into the Target centre and as the vehicle caught fire he tried to fight and stab police and bystanders.
It's understood a third person has also been taken to hospital. Their genders, ages, and condition are not known.
The auto burst into flames near the corner of Swanston and Bourke streets about 4.20pm on Friday and while the vehicle was quickly extinguished, reports soon followed of a knife attack.
The man then follows the attacker as he continues down the street with police around him, once again pushing his trolley towards the group.
"Police shot the male and he is now in a critical condition and under guard in hospital".
Victoria Police Superintendent David Clayton said when police arrived at the scene they were confronted by a man brandishing a knife and threatening them.
Police said there was no terrorism link at this stage but they are "keeping an open mind".
"Anyone with information or who witnessed the incident is asked to go to Melbourne West Police Station to make a statement", a police statement said.
The exact circumstances are yet to be determined at this stage. Victoria Police said at a press conference.
Witnesses described a chaotic scene with an injured pedestrian lying on the ground, and numerous police cars and helicopters flying overhead. Police initially responded to a report of a vehicle on fire near the corner of Swanston Street about 4.20pm.
Another said they heard "what sounded like a bomb and gun shot". Police response was swift and overwhelming.
Another witness said: "Big fire".
Her immediate thought was, "Oh no, not another Bourke Street incident", she said.
"I really wanted to help but I was in shock, I didn't know what to do. I heard at least one gunshot initially".