Firefighter who died battling suspicious fire in Victoria identified

A volunteer firefighter who died while battling one of three suspicious fires in regional Victoria has been remembered for his unparalleled leadership over almost four decades of service.

CFA member Garry Mallen was at one fire at a property on Short Street in Portland, in western Victoria, when he collapsed at 8.30am.

The three fires were reportedly lit between 7am and 7.30am on Camira Street, Short Street and within a bin on the corner of Percy and Gawler Streets, according to police.

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No one was injured in the fires, which are being treated as suspicious.

The Country Fire Authority confirmed the death of Mallen this morning.

Emergency services on scene administered CPR but he sadly died.

"Our deepest sympathies go out to the member's family, friends and colleagues at the Portland brigade," a statement from the CFA read.

"Our wellbeing team is providing support to all involved at this sad time."

It's believed Mallen may have suffered a medical episode and his death is not being treated as suspicious.

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Mallen, who was 66, joined the CFA in 1972 as a junior member of the Portland Brigade.

In a statement, the CFA said Mallen - a father, husband and grandfather - was an active member of the brigade.

"Those who knew him and worked alongside him speak of his leadership, experience and most importantly his support and willingness to mentor others through their own leadership journey," the CFA said.

"Our hearts are heavy today as we acknowledge Garry's service supporting and protecting his community for over 30 years."

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WorkSafe will investigate and detectives from the Arson and Explosives Squad will also attend the scene.

Anyone with information is urged to contact police.