Police have arrested a man following a crash on the A120 at Coggeshall.
A black Mercedes C200 and a blue Peugeot 206 were in collision shortly after 12.30am .
An ambulance spokesman said: "We treated three casualties at the scene.
"Their injuries weren’t thought to be life threatening but two of them were conveyed to Colchester General Hospital for further care."
One person had to be cut free from one of the vehicles by fire crews using specialist cutting equipment.
They were released by 1.35am.
A 23-year-old Colchester man was arrested and has been released on bail until June 8.