Firefighters were called to a blaze involving two motorcycles in the early hours of the morning.
A crew from Princes Street fire station was sent to the grounds of Suffolk New College in Rope Walk at 2.42am.
The cause of the fire is thought to be suspicious and Suffolk Constabulary has been informed.
A spokesman for Suffolk Fire and Rescue Service said: “Crews arrived to find two motorcycles well alight and used a hose reel to bring the blaze under control, which was achieved at 3.13am.
“The cause of the blaze is suspicious and police have been notified.
“The crew returned to their base station at 3.31am.”
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