A WHEAT storage facility at Dunolly has been significantly damaged.
Four heavy-duty tarpaulins at the Desmond Street property were cut causing damage worth $40,000 to the grain, police said.
The damage to the tarpaulins, which was discovered on Thursday, is estimated to be worth up to $25,000.
Detective Constable Rob Ward said police had not questioned any suspects and needed public assistance.
"There was no forced entry or anything like that; the premises is basically an open area," he said.
"It's possible someone has seen something.
"We haven't questioned anyone as yet, we're waiting for help from the public on this one."
GrainCorp runs the property and the wheat is stored in large pits.
Images show the tarpaulins had been cut and pulled from the storage units.
A long section was damaged, exposing the wheat.
"It occurred some time between 4pm on Wednesday and 9am Thursday," Detective Constable Ward said.
"With the tarps being cut, the rain has damaged the wheat underneath."
Police said wheat worth $1.5 million was stored at the facility.
Anyone who may have seen suspicious activity should contact Crime Stoppers on 1800 333 000.
Crime Stoppers is also available online at www.crimestoppers.com.au