A man from the Norwich area has been released on police bail after a crash on the A1065 near Barton Mills on Friday.
The crash happened between Barton Mills and Eriswell at about 2.30pm and involved three vehicles, with one ending up on its side by the road.
Police, fire and ambulance personnel attended and a woman that was in the vehicle on its side was airlifted to Addenbrooke's Hospital with serious injuries. She remains in a stable but serious condition.
A man in his late 20s, from the Norwich area, was arrested on suspicion of driving while under the influence of drugs but has been released on police bail until February 7.
The road was closed at the junction with the B1112 and at the Fiveways roundabout following the collision.
The vehicles involved are thought to have been a black Audi A4, a black Renault Megane and a black Ford Mondeo.
• Anyone with information on the collision is asked to call Suffolk police on 101, quoting CAD 213 of Friday, December 30.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here