The Australia Transport Safety Bureau (ATSB) granted a no-fly extension today.

The no-fly zone is within an 18 kilometre radius of Porepunkah Airport and it includes all aircraft, including drones.

The ban was initially established due to police suspicion that Freeman remains armed and poses a risk to aircraft.

The manhunt for accused cop killer Freeman has now entered its 28th day.

A heavy police presence remains on the ground in Porepunkah, neighbouring town Bright and the greater Victorian alpine region.

Victoria Police said crews are committed to using “every available resource and the necessary skills” needed to find Freeman.

“Resourcing numbers will continue to fluctuate in-line with operational requirements,” a police spokesperson said.

Police last week lifted travel warnings for Porepunkah, however reminded residents and visitors to remain vigilant.

Members of the public had been earlier advised to avoid the small town in Victoria’s north-east.

Victoria Police Deputy Commissioner Russell Barrett said the move was to enable local residents to “return to a state of normality”.

Police anticipate visitor numbers will increase over the school holiday period.

Locals breathed a collective sigh of relief as the normally thriving town struggled for nearly three weeks under major travel restrictions.

“It’s been hard, we lost I’m guessing, in the 20 thousands in turnover,” Cherry Walk Cafe owner Leanne Boyd told 9News.

The Mount Buffalo National Park remains closed.

“This decision is being constantly assessed and we will advise as soon as the park can re-open,” Victoria Police said in a statement.

Freeman, 56, has not been officially seen since August 26 when he allegedly gunned down officers Neal Thompson, 59, and 34-year-old Vadim De Waart-Hottart.

A $1 million reward was offered for any information leading to the arrest of the accused gunman, the largest of any offered in the state.

Superintendent Craig Darlow last week said police have been given 200 tips since the reward was announced.

Detective Inspector Dean Thomas said he remains open to all possibilities in regards to the whereabouts of Freeman and said the reward was “just another avenue” in the hunt.

Police have received more than 1000 tips from the public so far.