Part of a major road in and out of Hitchin has been shut, as police say they are responding to an incident on the A602 Park Way.
Herts police say they are currently at the scene of an "incident" on the A602 Park Way in Hitchin.
Police are telling people to avoid the area at this time.
For those making essential journeys, the AA's online roadwatch tool shows traffic building from the roundabout at Upper Tilehouse Street, down to the Stevenage Road roundabout.
More information to come as we get it.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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