A man has been seriously injured after being shot in the leg outside the Campbellfield Plaza shopping centre, in Melbourne’s north.
Police said the shooting occurred around 3.30pm outside an Officeworks store on the corner of the Hume Highway and Mahoneys Road in Campbellfield.
It is believed a man approached the victim with a firearm in the carpark before shooting him in the leg.
"I heard gunshots, and saw a man with a gun," a witness told 9NEWS.
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The victim was been taken to the Royal Melbourne Hospital with life-threatening injuries.
The shooter fled the scene in a red Holden Commodore and was last seen driving towards the Dallas area, police said.
Police received reports of a number of shots being fired near the intersection of Riggall and Blair Streets in Broadmeadows a short time later.
Multiple shots were reportedly fired into the air and a car matching the same description was also seen in the area.
No one else is believed to be injured in either incident.
Investigations continue.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000.