Two drivers were taken to hospital after a serious crash near Diss.
Officers were called to the crash on the B1118, near Low Road, between Oakley and Hoxne at about 8.30pm on Thursday, March 30.
A blue Ford Fiesta Zetec and a black Audi A6 were involved in the crash.
The East of England Ambulance Service and fire crews were also called to the crash.
Both drivers, aged in their 30s, suffered serious injuries and were taken to Norfolk and Norwich Hospital for treatment where they remain.
Their injuries are not thought to be life threatening or life changing at this time.
Police would like to speak to anyone who may have witnessed the crash, or the driving manner of the vehicles before the incident, or who may have any dashcam footage.
Anyone with information is asked to contact the Roads and Armed Policing Team at Suffolk police quoting CAD 403 of March 30.
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