Alleged gunman Dezi Freeman fled into the bush on Tuesday following a fatal confrontation at a property in Porepunkah, about 300km northeast of Melbourne.
He is accused of killing Detective Leading Senior Constable Neal Thompson, 59, and Senior Constable Vadim De Waart, 35.
Tough conditions have impacted search efforts with blizzard-like conditions and lashings of rain battering the rural town.
More than 450 police officers have been deployed to Porepunkah as part of the search, which has included examining disused mines, caves and dugouts in and around the rural community.
Police say they have received several reported sightings of Freeman since he went on the run, though none have been confirmed.
"There have been alleged sightings which we're exploring," Victoria Police Chief Commissioner Mike Bush said. "We can't confirm that they are of him, but if you think you see him, let us know. We'll explore it."
A police forward command post was relocated on Saturday from Feathertop Winery just outside Porepunkah to a government office in the town of Ovens, about 12km away.
"The new site is a fit-for-purpose facility and will best support Victoria Police's operational activity moving forward," Victoria Police said in a statement.
"We would like to reassure the community that police are not leaving the area."
Victoria Police also said they had arrested a 61-year-old man at a property in Bright, about 6km from Porepunkah.
The arrest follows the execution of a search warrant about 4.45pm on Friday, in which guns and cannabis were seized from the home.
The man was being interviewed by investigators on Saturday afternoon.
When asked whether the man was associated with Freeman, a Victoria Police spokesperson told AAP that line of inquiry would form part of the interview conducted by detectives.
It comes two days Freeman's 42-year-old wife Mali and 15-year-old son were arrested on Thursday night following an operation at an address in Chandler Court near the town's centre, before they were interviewed and released.
"There may or may not be charges that follow," Mr Bush said.
Police helicopters and drones have been circling the area for days in the hope of catching a sign of the fugitive's whereabouts.
Freeman, who has bush survival experience, was last seen in dark green tracksuit pants, a dark green rain jacket, Blundstone boots and reading glasses, police said.
He is believed to be a sovereign citizen, a follower of an ideology that rejects government authority and the rule of law.
