Gwent Police are appealing for any witnesses following an alleged assault in Apollo Way, Blackwood, on Friday 13 October between 7pm and 8.30pm.
Three men reportedly threw a firework towards a teenage girl, who suffered minor injuries.
Two of the men allegedly left shortly after, travelling along Albany Road towards Gordon Road in a dark coloured Citroen C4.
Officers would like to speak to anyone who has any information, CCTV, or dashcam footage in Apollo Way, Blackwood, between 7pm and 8.30pm on Friday 13 October.
You can call them on 101 or send them a direct message on Facebook or X, quoting log reference 2300349206 with any details.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.