Police are appealing for information after the youths were seen letting off fireworks at The Stadium Park on Thursday.
It comes after a teenage girl and a police officer were hit with fireworks in West Bromwich town centre this week.
PCSO Bethany Bennington said: "On 22nd October there was an incident at The Stadium Park, Chadsmoor where a large group of youths were seen on CCTV setting fireworks off.
"Officers are in the process of identifying the offenders. If anyone has any information as to who was involved please send a message to PCSO Beth Bennington."