Around 20 military personnel have been taken to hospital - including some with "life-changing" injuries - after three vehicles collided during a training exercise.
Police said they were called to a crash near Westdown Camp, close to Stonehenge, at around 6.30pm today.
A Wiltshire Police spokesman said: "We received a call from the air ambulance at 6.30pm today who told us they were attending.
"First responders and three military ambulances were also at the location.
"We had reports of four to five people with life changing injuries and approximately 16 others 'walking wounded'.
"The road traffic collision happened on a by-way which cuts through The Plain, hence why we were called.
"It is still regarded as a Wiltshire Police matter as it's on a by-way, although it's off the main road."
