A teenage girl has been hit over the head with a motorcycle helmet in an alleged assault in the Winston Churchill Memorial Park in St Brelade.
An 18-year-old man accompanied by a 16-year-old boy, who are known to the girl, are said to be involved.
A glass bottle was also thrown at the girl before a fizzy drink was poured over her.
Police say she suffered a bump on her head and some soreness but did not need medical attention.
One of the two males involved is described as 18 years old, was wearing grey joggers and a grey jumper, and was of a thin build with brown hair and some stubble.
The second boy is described as 16 years old wearing a navy blue or black gilet and black joggers, possibly with a black jumper. He is of average build with long curly brown hair and stubble on his face.
Anyone who may have seen this or who has any information is asked to contact police on 612 612 or Crimestoppers anonymously on 0800 555 111 or by anonymous online form.