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The remote bushland property where two police officers were murdered could be used as a retreat or training centre if the Queensland government clears the way and ensures it never falls into the hands of conspiracy theorists.

Constables Matthew Arnold, 26 and Rachel McCrow, 29, died in a hail of gunfire after pulling up to the rural property at Wieambilla, three hours west of Brisbane, on December 12.

Neighbour Alan Dare was also gunned down in the melee sparked when conspiracy theorists Gareth Train, his partner Stacey Train and brother Nathaniel Train opened fire upon their approach.

The officers were checking the property, owned by Gareth and Stacey Train, while conducting a missing persons check for Nathaniel Train.

The Queensland Police Union said on Tuesday it wanted to buy the block and had asked the government for help resuming the land.

"The QPU would never want to see this land fall into the hands of any other anti-vaxxer, pro-gun conspiracy theorist, sovereign citizens who may seek to utilise the reputation of this site to promote their own dangerous and warped views," union head Ian Leavers said in a statement.

"This site is one that we as police have a duty to protect, and we will ensure its future usage is both appropriate and sympathetic."

Mr Leavers hoped the land could be used for a retreat for officers, a training centre and be the site of a memorial.

The government is reportedly considering the proposal.

On Monday, Premier Annastacia Palaszczuk paid her respects to the slain officers ahead of a public memorial at the Brisbane Entertainment Centre on Wednesday.

"Everyone's gone through a really rough time out here and I want all of Queensland and all of Australia to continue to show their support for the two young lives that were tragically taken," she said.

"Wednesday is going to be a very difficult day."

Some 8000 people are expected to attend the memorial before family and friends farewell the constables at private ceremonies.

Members of the public are invited to attend the ceremony alongside family, friends, dignitaries and police officers. Free tickets were available from Monday night.

The service will be live-streamed online and on TV, and Queenslanders will be able to watch the event at a number of public venues around the state, including in communities near Wieambilla such as Tara, Dalby and Chinchilla.

Investigators are probing the circumstances of the attack, which fellow officers Constables Keely Brough and her colleague Randall Kirk managed to escape.

After the initial ambush, the Trains were shot dead in a firefight with heavily armed tactical police officers.

Investigators are still to officially declare a motive but are probing links between the Trains and conspiracy groups online and their digital footprints.

© AAP 2022

Melbourne Victory are preparing their response to Football Australia's show cause notice for their fans' violent derby pitch invasion as the A-Leagues powerhouse braces for point deductions, fines and crowd bans.

Victory have until 9am AEDT on Wednesday to show why they "should not face serious sanctions for bringing the game into disrepute" after their active fans stormed the AAMI Park pitch on Saturday night, forcing the abandonment of their A-League Men match.

Melbourne City goalkeeper Tom Glover was hit by a metal bucket wielded by a pitch invader and referee Alex King was also injured, while a television cameraman was struck by a flare.

Victory and FA have been inundated with information from supporters and the general public while Victoria Police confirmed on Monday three men had been charged for their roles in the pitch invasion.

A 23-year-old Craigieburn man accused of throwing a bucket full of sand at Glover was charged with violent disorder and discharging a missile, among other offences.

Another two men - a 19-year-old from Meadow Heights and an 18-year-old from Alphington - were also charged with allegedly assaulting the goalkeeper in separate incidents.

All three men self-presented to police stations on Monday and were bailed to appear at the Melbourne Magistrates Court in February.

Victoria Police alleged two security guards were also injured during the pitch invasion, when more than 150 fans ran onto the playing arena.

About 50 flares were allegedly lit in the stands, with at least three thrown onto the pitch, while about $120,000 worth of damage was caused to AAMI Park.

FA has confirmed repercussions could include financial penalties, loss of competition points and playing matches either behind closed doors or on neutral territory.

"We will move quickly to properly investigate this matter and where appropriate, issue the strongest possible sanctions to the club and individuals involved," FA chief executive James Johnson said in a statement.

The perpetrators appear likely to receive life bans.

"This is a small group of perpetrators that don't love football, that don't love the A-League and that don't love Melbourne Victory," A-Leagues boss Danny Townsend told Seven Network's Sunrise.

"We've got to weed them out and we've got to make sure that what happened on Saturday night never happens again."

FA has not ruled out sanctions against City or Glover, who tossed a flare thrown onto the pitch by fans back into the crowd, prompting some supporters to storm the field.

Glover returned to training on Monday with dressing protecting the stitches used to repair a "severe laceration" on the side of his face.

The goalkeeper, who also suffered concussion, expressed disappointment over the position Australian football now finds itself in, two weeks after the Socceroos' impressive World Cup run ended.

"The incident is disappointing for Australian football itself," Glover told the Nine Network.

"The Socceroos were unbelievable and (we were) hopefully riding the wave of that, but a small minority kind of ruins it."

© AAP 2022

Three men have been charged over a violent pitch invasion at an A-League men's clash in Melbourne.

A 23-year-old Craigieburn man accused of throwing a bucket full of sand at Melbourne City's goalkeeper on Saturday was charged with violent disorder and discharging a missile, among other offences.

Another two men - a 19-year-old from Meadow Heights and an 18-year-old from Alphington - were also charged with allegedly assaulting the goalkeeper in separate incidents.

All three men self-presented to police stations on Monday and were bailed to appear at the Melbourne Magistrates Court in February.

The storming of AAMI Park during the clash between Melbourne Victory and Melbourne City injured goalkeeper Tom Glover, referee Alex King and a TV cameraman.

A bucket hit the head of Glover, who suffered a cut requiring stitches and left him with a suspected concussion.

King, who went to protect Glover, was also struck by the bucket.

Premier Daniel Andrews said the scenes from Saturday night were shameful and condemned the violence.

He warned the "cowardly" pitch invaders yet to hand themselves in to police would feel the full force of the law and soccer authorities.

"That's a venue that's owned by every single Victorian and I think the vast, vast majority of Victorians would have been sickened, as I was, to see that," Mr Andrews said on Monday.

Asked about possible reputational damage from the ugly scenes ahead of Australia hosting the 2023 FIFA Women's World Cup, Mr Andrews said most Victorian major event crowds did not behave that way.

"That's why it's so jarring. That's why it's such an affront," he said.

On Sunday, Victoria Police Acting Superintendent Jason Goddard branded the behaviour of the alleged pitch invaders as "disgraceful".

The chaotic scenes resulted in the game being abandoned in the 20th minute after Victory fans stormed the pitch.

A flare had earlier hit the Network 10 TV cameraman in the back of the head, which police said left him with a contusion and burned clothing.

The outbreak of violence made worldwide news and Victory issued a late-night apology to those affected.

Both sets of fans had planned to walk out at the 20-minute mark as part of a protest against the Australian Professional Leagues' decision to sell the next three grand finals to Sydney.

The crowd chanted "f*** the APL" while unfurling banners pre-game and during the match and throwing flares onto the playing arena.

But the situation escalated when a flare from the Victory active area hit the cameraman and exploded and Glover picked up another flare off the ground and threw it back into the stands.

Football Australia, which manages judiciary matters, has promised heavy penalties and "strong sanctions" against those found to be responsible, while also issuing a show-cause notice to Victory.

The club has until 9am AEDT on Wednesday to show why it "should not face serious sanctions for bringing the game into disrepute through the conduct of its supporters".

© AAP 2022