A 14-year-old girl and a friend were at Upton Recreation Ground in Sea View Road at around 5.30pmm on Sunday 15 May when they were approached by a group of male teenagers, two of whom were on bicycles.

The group attempted to engage the victim in conversation and blocked her path with one of the bikes. The victim attempted to push one of the teenagers out of the way and he kicked her between the legs. She did not sustain any serious injuries.

Police Constable Katie Wallis, of Dorset Police, said: “We are continuing to investigate this assault and have obtained further details from the victim. We understand that a man intervened and came to the aid of the victim following the assault and we are keen to identify this individual as they may have information to assist our investigation.

“I would also urge anyone with information relating to this incident to please come forward.”

Anyone with information is asked to contact Dorset Police at www.dorset.police.uk/contact, via email 101@dorset.pnn.police.uk or by calling 101, quoting occurrence number 55220077173. Alternatively, independent charity Crimestoppers can be contacted anonymously online at Crimestoppers-uk.org or by calling Freephone 0800 555 111.