Police are appealing for information as they investigate a suspected arson attack, which saw 750 tonnes of straw go up in flames.
Officers say the fire at Great Waldingfield airfield caused thousands of pounds worth of damage.
Police believe the fire was started deliberately between 4pm and 5.30pm on Saturday, September 17.
A spokesman for Suffolk Police added: "A group of young males and females were seen on the straw stacks prior to the fire.
"Anyone who witnessed the arson or who has any information that could assist the investigation is asked to contact Suffolk Police, quoting crime reference 37/60203/22."
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