Three people were taken to hospital with injuries after a car flipped onto its roof.
Officers were called to reports of a crash in Combs Lane, Stowmarket, at about 7.30pm on Tuesday.
A Renault Megane had flipped onto its roof.
Three people in the car were taken to hospital with minor injuries.
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A spokesman for Suffolk police said: "Officers want to trace a small blue car seen in the vicinity just prior to the incident."
Anyone with information should contact Suffolk police, quoting CAD 351 of July 4.
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