A 71-year-old man has been questioned and released pending assessment of the brief of evidence in relation to two deliberately lit grass fires in the Rutherglen area in October.
An investigation was launched by police alongside CFA, specialists from Melbourne, Wodonga's criminal investigation unit and members of the community.
Senior Sergeant Garry Barton said the community should be aware all fires were investigated and should be taken seriously.
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"The practice of lighting or deliberately burning tall grass on the side of the road without the right control measures or approvals is incredibly dangerous," he said.
"We work with our partners DWELP and CFA really closely by sharing information to prevent fires, and this year will be no different."
Anyone who sees any suspicious fire behaviour should call triple-0.
Those with information on deliberately lit fires are urged to phone Crime Stoppers on 1800 333 000 or their nearest police station.
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