Police are investigating a sex attack in Savernake Woods.
Officers were at the scene earlier today.
Det Insp Joe Saunders from Wiltshire Police said: "Our enquiries are currently ongoing and there is a scene preservation area in place and people in the area may notice increased police activity while we carry out our investigation.
"We would like to hear from anyone who may have heard or seen something suspicious on Monday morning.
"The forest is a popular place for early morning walkers and dog walkers - so it's possible there are several potential witnesses to this incident.
"No arrests have been made at this time but please be assured we take all reports of this nature very seriously.
"Our victim is currently being provided specialist support.
"Additional police patrols are also being conducted in the area for public reassurance - if you have any information which could help us please contact 101 quoting crime reference number 54200108196.
"You can also speak to any of our officers if you see them out on patrol."
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