Each shootings occurred exterior the Outlaw Motorbike Gang clubhouse on Titan Drive in Carrum Downs within the metropolis's south-east in 2019.
Within the first incident, pictures had been fired into the clubhouse shortly after 7.45pm on Friday, September 27, 2019, whereas quite a lot of individuals had been standing exterior.
Nobody was injured within the assault, which police consider was focused and certain associated to growing tensions between the Outlaws OMCG and Comancheros OMCG.
Police consider the pictures had been fired from a dark-coloured SUV was that seen driving previous the constructing on the time.
Plain garments police in an unmarked automobile had been within the space on the time and heard the taking pictures.
They instantly started patrolling the world.
As they drove previous the clubhouse, quite a lot of pictures had been fired at them.
Police consider the pictures had been fired by an individual probably related to the Outlaw OMCG.
The 2 detectives weren't injured.
On the time of this second taking pictures, a individuals and automobiles had been gathered exterior the clubhouse.
A dark-coloured Audi Q7 SUV was set on fireplace in a laneway on the western finish of Hallam Valley Highway in Dandenong South the next day, on Saturday, 28 September, 2019.
Police consider this automobile, which had been stolen from Melbourne's western suburbs earlier that month, was the automobile used within the preliminary taking pictures exterior the clubhouse.
CCTV footage from that space reveals the SUV and a silver VW Golf each turning proper on to Hallam Valley Highway from South Gippsland Freeway, shortly earlier than the car was set alight.
The silver VW Golf then left the world.
Police consider the offenders behind the automobile fireplace left the world within the VW.
Detective Inspector Mark Hatt stated the shootings led to "a big danger of loss of life or critical harm to police and others".
"It's extremely lucky that neither of our detective senior constables had been bodily injured within the taking pictures," Hatt stated.
"This incident continues to resonate with them nearly three years later.
"The end result of those occasions might have been a really totally different story."
Hatt stated police had been unable to cost anybody over the incidents throughout the investigations over the previous two years.
Police are re-releasing that CCTV from the incident at the moment and urging anybody who recognises the autos, or who has any info on the evening's occasions to return ahead.
He stated it was hoped the provide of a reward would entice somebody with essential info to contact police.
"There have been quite a few individuals on the clubhouse on the time, all with household, mates and associates. It's probably that they've spoken concerning the incident," he stated.
"Circumstances change and somebody who might not have needed to supply info to police beforehand might now really feel prepared to take action."
The reward of as much as $250,000 might be paid on the discretion of the Chief Commissioner of Police for info resulting in the apprehension and subsequent conviction of the particular person or individuals liable for the incidents.