Emergency services are currently in attendance of a road traffic collision in Royal Wootton Bassett.
Police, ambulance and two fire crews are at the incident on the A3102 at junction with Longleaze.
A black Peugeot, red BMW and black Jeep were all involved in the collision at around 6.30pm.
999 crews are working to free one casualty — a woman driver who is medically trapped — from the BMW.
The main road is open in both directions, with police directing traffic through a partial closure. The Longleaze turning is blocked in both directions.