Two people were killed when the car they were in left the road at Bartlow on Saturday night (August 9).
The pair, both in their 50s died after the Mercedes C63 they were in left the A1307 and crashed into a tree at about 6.50pm on Saturday (August 9).
They had been travelling towards Haverhill at the time of the crash.
The pair have not yet been formally identified, though it is thought they were both from Haverhill.
PC Simon Burgin, investigating, said: “I would appeal to anyone who saw the crash, or the vehicle prior to it, to call police.”
Anyone with any information should call the Roads Policing Unit on 101.