A dog walker was seriously assaulted after he challenged a group of teenagers who set fire to a bin.

Police say the incident took place at King George Recreation Ground in Bushey at 10.30pm on Wednesday June 1.

The victim was assaulted moments after he told teenagers who set alight a litter bin in the children's play area he would be calling the police.

The dog walker was pushed to the floor before being punched several times and kicked once to the head.

He sustained cuts, grazes and swelling to his face but did not go to hospital.

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Police have launched an appeal to find the teenagers responsible.

The group was made of up of at least four boys and two girls, all of whom are believed to be white.

After assaulting the man, they fled the park towards Ashfields Avenue via Somers Way.

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Hertfordshire Constabulary has asked parents to recall whether their child returned home on June 1 smelling of bonfire smoke or with a torn jacket.

Anyone with information about the incident can call 101 quoting crime reference 41/44882 or contact Crimestoppers anonymously on https://crimestoppers-uk.org/