A boy was injured during an altercation at Royston Football Club, and police are appealing for information and witnesses.
The fight took place during a summer fair on Sunday, May 28, between midday and 5pm.
Two boys were playing football, and one allegedly jumped onto the other boy, leaving him with an injury to his arm.
Detective Constable Rebecca Hargrave, who is investigating, said: "Our enquiries are continuing, and we are appealing for anyone with information to please get in touch.
“We know that the event was a fairly busy and we are hoping that someone may have seen the incident or have some information that will help us with our investigation."
Anyone with information is asked to email Detective Constable Hargrave via rebecca.hargrave@herts.police.uk.
You can also call the non-emergency number 101, quoting crime reference number 41/43711/23
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