A 13-year-old boy has been left with minor injuries to his face and head after an assault in Hastings on March 28.
Police said the victim was in the West Hill play area having a discussion with other children, at around 4.50pm.
As he went to leave, he was assaulted.
Officers investigating the matter are keen to speak to anyone who was in the park at the time and who saw what happened.
Anyone with information is asked to contact 101, quoting serial 1092 of 28/03.