A scene is currently in place at Culver Street Car park, Salisbury, following the discovery of a body.
Wiltshire Police said in a statement: "We were contacted at around 10pm last night (13/04) after a woman in her 40s was found unresponsive.
"Despite the best efforts of the emergency services she was declared dead at the scene.A scene has been put in place while we conduct our enquiries.
"A man in his 20s has been arrested on suspicion of manslaughter.
"While we understand the public concern that this may cause, there is no wider threat to the public."
A scientific investigations team have been working in the car park this afternoon following the discovery last night.

Salisbury Cathedral Cloisters to Host Festive Fair
Salisbury Foodbank Calls on Local Community to Make a Difference This Christmas
Gallery: Panto Rehearsal is in Full Swing at Playhouse
Witnesses sought following fatal collision on A303
Planning Approval Marks Major Milestone for New Salisbury Hospital Hub
Green Lane Improvements Completed
Salisbury Playhouse Halfway to £22m Transformation Target
Young voices from Bemerton Heath Take Centre Stage at National Conference
