Police will scour mines, caves and dugouts for a fugitive accused of shooting two of their own dead as conditions deteriorate on the fourth day of the search.
Dezi Freeman fled into bushland on Tuesday after he allegedly killed Detective Leading Senior Constable Neal Thompson, 59, and Senior Constable Vadim De Waart, 35, at a Porepunkah property in regional Victoria.

A Bearcat leaves the property where Freeman lived on Thursday night.Credit: Justin McManus
Another wounded officer, who was among the group of 10 attempting to serve a search warrant relating to alleged child sex offending, is expected to recover after undergoing surgery.
With Freeman on the run, the small community about 210 kilometres north-east of Melbourne has been urged to stay vigilant.
Weather conditions on the ground were forecast to deteriorate on Friday as showers laced with hail and thunderstorms passed through, including snowfall at higher elevations, senior meteorologist Angus Hines said.
Every available asset and police capability was being deployed to apprehend Freeman, Deputy Commissioner Regional Operations Russell Barrett said.
AAP