A 15-year-old boy sustained head and facial injuries after he was attacked in Cavehill Country Park in north Belfast on Saturday, 21 September.
The teenager and some friends were walking in the area when fireworks were thrown at them by a group of youths.
The group then set upon the victim, kicking him several times and pouring a drink over him before making off.
The teenager sustained head and facial injuries and was treated in hospital.
Officers would like to hear from anyone who witnessed the assault or who could help identify those involved. Please call 101, quoting reference 1883 21/09/19.
“Were you in the area of Cavehill Country Park last Saturday, 21 September?
“At around 7.30pm, a boy was attacked by a number of youths on the pathway to the quarry.
“If you have any information about this assault, please come forward and speak with us.
“The incident number you need is 1883 of 21/09/19. You can reach us by calling 101,” said a police spokesperson.