An air ambulance has landed at the scene of a serious crash in south Wiltshire.
Emergency crews are currently at the road traffic collision on the A36 at the junction with B390 near Knook, with the main road closed in both directions.
A spokesperson for Wiltshire Police said: “Road closures are in place at Heytesbury Roundabout and Upton Folly Cross Roads. Please find an alternative route.” 
Road closures are expected remain in place for several hours.
