Major disruptions are expected in the CBD on Friday evening, as details of a major incident in Bourke Street emerge.
A car was seen burning on the northern strip of Bourke Street near the Target store, and a man was shot by police after an alleged stabbing, according to the Age.
A Victoria Police spokesperson told Broadsheet a man was arrested at the scene and taken to hospital under guard in a critical condition.
The spokesperson advised a "small number of people" have been stabbed and police are not seeking anyone further at this time.
A witness at the scene told Broadsheet: "I just drove out of the city, cops were racing down Elizabeth Street."
Bourke Street is currently blocked between Swanston and Russell streets, and people are being advised to avoid the area.
At the time of publishing, Swanston Street trams are delayed in both directions, and route 86 and 96 trams are diverting along La Trobe Street between Melbourne Museum and Spencer Street, according to Yarra Trams.
Metro Trains tweeted CBD railway stations remain open and train services are running normally. For updates, head here.
Anyone with information is being asked to make a statement at the West Melbourne Police Station.
Chaos in #bourkest as a guy seems to have set his car on fire then attacked police with a knife. Police response was swift and overwhelming. I heard at least one gunshot initially. pic.twitter.com/j5BB8VVehI— Meegan May (@meegslouise) November 9, 2018
BREAKING | A car has crashed at the Bourke Street Mall and burst into flames.— 3AW Melbourne (@3AW693) November 9, 2018
We're chasing more details. pic.twitter.com/yIMyIf76AS
Significant fire in Bourke Street - road blocked between Swanston and Russell Streets pic.twitter.com/H6xO1pzy5L— acuriouscook (@loumick3) November 9, 2018
#BREAKING - A car has crashed at the Bourke Street Mall and burst into flames.— Brianna Travers (@briannatravers) November 9, 2018
Caller Sarah says people were running away from the scene.
"It's so chaotic. There's people everywhere. There are police everywhere."