Victoria Police Commissioner Mike Bush said it was possible Dezi Freeman has access to 'technology', while also addressing possible sightings of the fugitive.

'I'm not going to give too much away in terms of that, it's quite possible that the suspect at large has access to technology,' Mr Bush said.

'So it will be very unwise of me on behalf of the investigation… to share further information, I'm sure you can understand.'

Commissioner Bush said there have been 'alleged' sightings of Freeman but nothing he could confirm.

'They have been alleged signs which we're exploring, we can't confirm that they are.'

He again encouraged the public to call triple-0 if they believe they have spotted Freeman.

Commissioner Bush confirmed Freeman's wife and teenage son were arrested and may be charged.

'There was search warrants executed last night, people were interviewed totally and specifically in relation to the homicide investigation,' he said.

'So those searches have been completed, the interviews have been conducted, those people have been released.

'There may or may not be charges that followed from it would be very inappropriate for me to say anything else at this point.'

He warned anyone helping Freeman that they would be committing an offence.

Porepunkah Pub has reopened for the first time since Tuesday's deadly police shooting.

The watering hole welcomed back weary locals at 4pm Friday.

Our reporter Karleigh Smith says it's 'pretty busy' there tonight.

'Over the past few days, our town has been through an incredibly difficult and unsettling time. We know many in our community are still processing and seeking connection, and we want to offer the pub as a safe and welcoming place for people to gather,' the pub posted online.

'Our team is here to provide a comfortable space where friends, family, neighbours and visitors can sit together, share a meal, and support one another. We believe in the strength of this community and the importance of coming together in moments like these.

'We look forward to welcoming you this afternoon and evening, and we thank you all for the resilience, kindness and support you continue to show.'

A local woman who was friends and attended church with Freeman and his family has urged the fugitive gunman to hand himself in.

Friend Marlie Thomas said Freeman had become more withdrawn in the days before the fatal shootings.

She attends the local Our Lady of Snows Catholic church alongside Freeman and his wife.

'We knew he was withdrawing a little bit,’ she told AAP.

'We said, "we've got to keep a closer eye on him".'

She urged Freeman to 'please come in, hand yourself in'.

Chief Commissioner Mike Bush also warned any people who may want to help Freeman should reconsider.

'This person does not deserve to be aided in any way. If any person knows him or comes in contact with him, they need to encourage him to hand himself in,' he said.

Chief Commissioner Mike Bush's promise to ensure authorities have all the resources to catch Freeman is already in action with extra boots on the ground in the region.

Daily Mail reporter Karleigh Smith is on the scene and has witnessed multiple police reinforcements (pictured) arrive at the mobile command post just near Wangaratta.

These officers will soon join the search with specialist Victoria Police cops already scouring Porepunkah for the fugitive.

Mr Bush said specialist AFP members were also providing assistance as more reinforcements are expected to join the hunt in the next 24 hours.

Commissioner Bush explained why SOG police didn't attend Freeman's property to serve the warrant on Tuesday morning.

‘What I can tell you is it was considered, but it wasn't requested,' he said.

'When they prepare for a search warrant, they'll do a risk assessment. They will then decide what level of risk is attached to that and what resources are required to support that.

'They did not consider a request to the Special Operations Group necessary.'

He ended the press conference with a promise to catch Freeman.

'I want to go back to my original point, the number one priority for the Victoria Police is to find the person who murdered our officers,' he said.

Premier Jacinta Allan appeared alongside Commissioner Mike Bush and thanked police for their efforts to catch Freeman.

'As Premier, along with the minister, we've had the opportunity today to lay a floral tribute in honour of the loss of Neil and Vadim, and to thank also them and recognise their dedicated service to this community and to the wider Victorian community,' Allan said.

'As we can see, there has been an outpouring of support and sympathy for the loss of these two strong members of Victoria Police.

'Finally, too, we've had the opportunity today to see part of the operation response in action.

'So I also want to thank all those members of the Victorian police [and the] wider emergency services family who are deploying every resource.'

Chief Commissioner Mike Bush has urged suspected cop killer Dezi Freeman 'to lay down your firearms and give yourself up'.

'I can assure you that we have every resource we require to locate the person responsible for this horrific homicide, the top cop said in a press conference at Wangaratta Police Station.

'We have over 450 police officers dedicated to this task…

‘My final point is for the local community, to give the locals that assurance that we are not leaving here until this person is in custody.

'In fact, if that person is listening, it really is time to lay down your firearms and give yourself up.'

Officers from Victoria, New South Wales, South Australia, the ACT, and the AFP are involved in the search.

Mourners are leaving floral tributes at Wangaratta Police Station for two police officers allegedly murdered by fugitive suspect Dezi Freeman.

Freeman allegedly grabbed a homemade shotgun and opened fire on detective Leading Senior Constable Neal Thompson, 59, and Senior Constable Vadim De Waart, 35.

Senior Constable Thompson (pictured below) was had been a police officer for 39 years, and spent the last 18 years working out of Wangaratta police station.

He was just days away from retirement when he was allegedly killed while attempting to serve a warrant on Freeman just before 11am on Tuesday morning.

Chief Commissioner Mike Bush will shortly give an update from the station.

Australian Federal Police officers have joined the search for fugitive accused cop killer Dezi Freeman.

'The AFP can confirm it is providing assistance to the ongoing police operation in Porepunkah, Victoria, at the request of Victoria Police,' an AFP spokesperson told the Daily Mail.

Victoria Police would not what reveal the type of assistance the AFP will provide, or how many officers are involved.

Earlier today, Anthony Albanese offered Victoria Premier Jacinta Allan a 'full court press' to catch Australia's number one fugitive.

Heavily-armed specialist police are understood to be tracking Freeman through a series of caves and disused mineshafts in the alpine region the accused cop killer is believed to have fled.

The update comes as weather conditions in the area are forecast to deteriorate late on Friday with strong winds and snow predicted as a cold front sets in.

Daily Mail reporter Wayne Flower is on the ground.

'It's bloody cold and very windy and the weather coming through is likely to make it tough for everyone involved,' he said.

Freeman, who has bush survival experience, was last seen wearing dark green tracksuit pants, a dark green rain jacket, brown Blundstone boots and reading glasses, police said.

Victoria Police Chief Commissioner Mike Bush will update the public at press conference scheduled for 1.30pm.

Residents in Porepunkah and surrounding areas have been urged to remain vigilant and report any sightings or suspicious behaviour.

Anthony Albanese has offered Victoria Premier Jacinta Allan a 'full court press' to join the manhunt for accused cop killer Dezi Feeman.

It's understood the offer includes deploying elite AFP specialist cops.

'What's occurred here is that we have offered the Premier, Jacinta Allan, every support that is required,’ Mr Albanese told the Today show.

'And this is a full court press. This guy clearly is dangerous. He's on the run and we want him caught and we want people who are traumatised in that northeast community of Victoria to feel safe again.

'Porepunkah is a small community and this has devastated them. It's devastated the families of the police officers who've lost their lives and of course, it's devastated, as well, the entire police family.'

The Daily Mail and witnesses heard what were first thought to be gunshots at about 5pm on Thursday but it was later confirmed to be stun grenades - also known as flash bangs.

Media reported seeing a 'big flash' near a police chopper while SOG members combed the ground-level area.

A flash bang is a non-lethal explosive device designed to temporarily disorientate individuals by emitting a blinding flash of light and a deafening sound upon detonation.

Sunrise reported witnessing a police officer leaning out the side of a hut on a property with what looked like a machine gun.

The K-9 unit was positioned at the bottom of a mountain as police searched through outhouses during a 'very active' morning in Porepunkah.

Freeman's housemate Fabio Zambelli (pictured below) told 10 News he was close to the accused cop killer’s wife Mali and their children who he said were 'highly stressed'.

'To Dezi, do the right thing for your family, give up, surrender,' he said.

'I'm not here to judge, but there's a woman and kids under high stress.'

Mr Zambelli also described Freeman as a 'professional, resilient bushman', and that no one has had contact with him.

'Mali, her family and Dezi and have been very kind to me,' he said.

Mr Zambelli slept in his car on Wednesday night because the Freeman's property has been declared a crime scene.

He urged police to bring Freeman in alive.

'By taking him alive, will allow us to have a better understanding of the situation,' Mr Zambelli said.

The Victoria Police Special Operations Group (SOG) chopper has just landed at an airstrip near Porepunkah as the search moves to mobile ground units.

Specialist police in armoured all-terrain vehicles known as ‘BearCats’ (pictured below) and the dog squad are moving towards bushland as the hunt for Freeman enters its fourth day.

Fugitive gunman Dezi Freeman sent an ominous warning to authorities that 'they picked the wrong person to mess with' and are 'finding that out'.

The accused cop killer also said 'Freeman's the name freedom's the game' when he appeared on a 2019 episode of The Mike Holt Show - a podcast favoured by cookers and crackpots.

Freeman, who changed his surname from Philby, appeared on the Mike Holt Show to boast about his insane claim he successfully arrested a magistrate at the Wangaratta court in 2019.

The alleged murderer ranted that authorities used him as a 'scapegoat' after an issue arose about road access to Mount buffalo National Park.

Freeman claimed authorities were suing him 'so they effectively get control of the mountain'.

'They think I'm the weak link,' Freeman said. 'They picked the wrong person to mess with, and I think they're finding that out'.

Details have emerged of a dramatic police raid at a Porepunkah address last night as cops continue to hunt suspected police killer Dezi Freeman.

Fugitive Squad detectives and Special Operations Group members converged at the property (pictured below) and told Freeman's 42-year-old wife, Mali, and their 15-year-old son to 'come out with their hands up' at 8.40pm, neighbours reported.

The pair were arrested, interviewed and then released pending further enquiries.

Police cordoned the area and called out through an armoured all-terrain vehicle known as a 'BearCat' to communicate with Mali and her son while they were in the house.

Neighbours were 'incredibly shocked' by the drama.

There have been no confirmed sightings of Freeman, 56, since two police officers were shot dead and a third injured on Tuesday.

The police chopper was back in the air above Porepunkah early Friday morning.

Daily Mail reporter Wayne Flower confirmed the chopper is flying lower than usual as the search enters its fourth day.

• It's day four of the search and sovereign citizen Dezi Freeman is still on the run in the Victorian High Country
• Police helicopters have circled overhead, drones have scanned the treelines, and roadblocks have been set up for kilometres, yet Freeman has disappeared without a trace
• Locals are baffled, with some believing he may have dug a secret underground bunker in preparation
• On Tuesday morning, 10 officers arrived at the Freemans’ remote farmhouse with a warrant over historic sexual assault charges
• Instead of surrendering, Freeman allegedly grabbed a homemade shotgun and opened fire. Detective Leading Senior Constable Neal Thompson, 59, was killed in the ambush. Senior Constable Vadim De Waart, 35, was also gunned down. A third officer was wounded but survived
• In a podcast six years ago, Freeman declared, 'The government can come in and police can come in and raid your fridge and cook your dog, if you give them consent'