Emergency services closed Needingworth Road in St Ives this evening following a "serious" crash in the town.
Residents reported seeing multiple police cars and ambulances at the scene near the A1123 tonight (February 28).
The East Anglian Air Ambulance landed in Warners Park and it is thought they were responding to the incident.
One resident said on social media: "Police have cordoned off near Fairfield’s and at the other end at the junction near the town."
Another added: "Needingworth Road was partially closed, there was an ambulance and two police cars there.
"It looked pretty serious so not surprised the air ambulance were there."
Cambridgeshire Police, the East of England Ambulance Service and the East Anglian Air Ambulance have been contacted for a comment.
For the most up-to-date information about the county's roads, visit our LIVE Cambridgeshire traffic map.
Join our Cambridgeshire Travel Information group on Facebook for all the latest traffic news in Hertfordshire.
Do you have a live or breaking news story from across Cambridgeshire? Email: cambslivenews@archant.co.uk
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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