A woman in her 20s was raped on Monday, while walking on a footpath that runs through The Paddocks former car park in Wokingham town centre.
Thames Valley Police said that the incident took place sometime between 3pm and 8pm on May 28 – the Whitsun bank holiday.
The former car park has been closed as a result of the Elms Field works and is currently a fenced off pathway leading from Shute End council offices through to Elms Road.
The woman was approached by two men, one of whom raped her. She managed to break free from the offender and leave the scene.
No description of the offender or the man accompanying him is currently available and the incident was reported to police on Tuesday.
Detective Chief Inspector Matt Stone, from Berkshire Force CID, said: “Detectives are currently working to establish the circumstances of this incident.
“I would like to appeal to anyone who witnessed what happened or who saw two men acting suspiciously in the area around the time of the incident on Bank Holiday Monday, to speak to police. If you have any information, regardless of how insignificant you think it may be, please come forward and speak to officers.
“The victim is being offered the support of a specially trained officer at this extremely difficult time.”
Chief Inspector Andrew Cranidge, Deputy Local Policing Area Commander for Wokingham, said: “I appreciate reports of this nature are concerning to people in the local community however an investigation is underway to determine what has occurred.
“People in Wokingham are likely to notice an increased police presence in the area while enquiries are ongoing. If anyone has any concerns or wishes to raise anything, they can approach and speak to an officer in the area or call our non-emergency number 101.”
If you have any information relating to this case, call 101 quoting reference ‘1369 29/5’, or contact Crimestoppers anonymously.