A child and a footballer were hurt today, Saturday, after protesters threw flares inside Radcliffe FC's Neuven Stadium.
At around 1pm, police received reports a group of male protestors outside were throwing flares inside the ground.
The venue was hosting AFC Bury's FA Cup match against North Shields.
Minor injuries were caused to a child spectator and a player.
Police are appealing for witnesses to come forward.
There is a heavy police presence in the area and enquiries are ongoing to identify the males involved.
Chief Inspector Samantha Goldie, of Greater Manchester Police's Bury Division, said: "While we anticipate protests taking place and facilitate them where possible, we absolutely do not tolerate violence.
"This is a public event and ultimately we want everyone to be safe and have an enjoyable time. Thankfully this reckless and dangerous action by a few did not result in serious injury.
"We are keen to speak to anyone who might have more information that could help identify those involved. If you witnessed this incident, or have footage, please share it with us as soon as possible."
Officers are keen to reassure the community in Bury that this is an isolated incident and is not connected to the reports of fireworks being used in an anti-social manner elsewhere in Bury.
If you have information that could assist with our enquiries, please call 0161 856 8181 quoting incident number 1,415 of September 3.
Alternatively, you can call the independent charity Crimestoppers anonymously on 0800 555 111.
A protest was planned at 11am this morning, Saturday, after a section of Bury FC fans voiced concers over the potential merge of the club with Bury AFC.
Fan group Vote No Merger organised the protest but said it was going to be peaceful.
It is not clear whether this protest was linked to the incident.
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