EMERGENCY services are attending a serious accident at Black Dog Hill on the A36 which has closed the main road in both directions.
The road is closed between the junction with the A361 at Beckington and the A3098 at Chapmanslade.
Drivers are being advised to find an alternative route as the road is likely to remain closed throughout the afternoon.
Wiltshire Police said: "We are currently dealing with a serious road traffic collision on the A36 at Black Dog Hill near Warminster.
The road is closed in both directions at this time and we would like to ask motorists to avoid the area and find alternative routes."
A spokesman for Highways England said: "Wiltshire Police are on scene.
"Traffic is being diverted locally. Closures are expected to remain in place for several hours.
"Road users are advised to allow additional time for their journey and consider alternative routes at this time."
more to follow
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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