A young woman was attacked in the early hours of Saturday close to Falkirk town centre.
The 22-year-old was in the Kemper Avenue/Glenbrae area when the incident occurred sometime between 2 a.m. and 3.20 a.m. She did not require hospital treatment.
Police are appealing for anyone with information to come forward.
Detective Inspector David Mitchell said: “We are particularly keen to speak with a man who was seen in the vicinity walking a white dog.”
Anyone with information can contact Central Scotland Police on (01786) 456000 or information can be given anonymously to Crimestoppers on 0800 555111.