The spectre of arsonists over Victoria's bushfire season has prompted the state's emergency groups to pull together to clamp down on the threat.
Victoria Police and the CFA will work with Parks Victoria and the Department of Environment and Primary Industries (DEPI) to both monitor and investigate arson attacks.
But police are also calling on community members to take action by speaking up if they witness or learn of any suspicious arson behaviour.
Arsonists sparked 12 of the 68 fires burning across Victoria last Friday, on what was one of the most high risk days for bushfires since Black Saturday.
Police believe a key area of concern for the agencies is public land along the Murray and Goulburn rivers, from Bundalong to Barmah, in Victoria's north.
DEPI's Land and Fire Regional Manager, Shaun Lawlor, reported an increase in deliberately lit bushfires and abandoned camp fires in recent years.
"Already this summer we have seen a number of deliberately lit bushfires in forest areas near townships," he said.