POLICE are investigating a fire at a business in St Arnaud, which destroyed about $1 million worth of hay and caused about $2 million worth of damage.
About 8500 hay bales went up in smoke in the fire on Sunday.
Emergency services were called to Charlton - St Arnaud Road about 7.30am.
Arson chemists and detectives are investigating the cause of the fire, which is expected to smoulder for days yet.
Northern Grampians Crime Investigation Unit has yet to establish whether the fire was suspicious.
Detective Acting Sergeant Caroline Blackley urged anyone with any information, pictures or footage of the fire to contact police.
Sergeant Blackley said the fire was believed to have started in the main shed. How, why, and exactly where within the shed the fire started were still the subject of investigation.
The blaze destroyed a storage shed and caused significant damage to a processing plant.
Sergeant Blackley said the business was still operating, despite the damage.
The business was not open on the day of the fire. Sergeant Blackley said passers by noticed the blaze.
Detectives have released CCTV footage of the fire.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au
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