A woman who was attacked with an unknown substance remains in hospital with facial injuries.
Police were called out to Braywick Playing Fields, off Braywick Road, just after 10am yesterday, to an assault on a woman, which they are still treating as an isolated incident.
The victim was approached by a man and assaulted and during the attack an unknown substance was used.
She suffered facial injuries in the attack and is still in hospital in a stable condition and is likely to remain there for the next few days.
Detective Sergeant Steve Witts said: "The investigation is in its early stages, but we believe it was an isolated incident.
"We are appealing for any witnesses to the incident to come forward, particularly anyone who was in the park between 9.30am and 10.30am today or anyone who saw the offender, who was wearing jeans and a black top."
Call police on 101 or Crimestoppers anonymously on 0800 555111.
Top Ten Articles
The Met Office has issued a yellow alert for Windsor and Maidenhead, Slough and Wokingham, warning that rain moving eastwards across the south of the country may turn to snow in some places.