Police have increased patrols near Yarmouth on the Isle of Wight after an 11-year-old girl was allegedly sexually assaulted during a family visit to a picnic site.
The girl was at Fort Victoria on Saturday morning when she was approached by a man who assaulted her before walking away, Hampshire Police said.
Detective Sergeant John Stirlingsaid: “This was a rare but very serious incident against a child, during the day in a busy picnic site.
“We would like to hear from anyone who may have witnessed anything suspicious in the area or who recognises the man from the description.”
The man was said to be white with pale skin, aged in his 50s, with grey hair and was clean shaven. He was around six feet tall, of average build and with a deep voice.
He was wearing a short-sleeved shirt with dark blue and light blue stripes and blue jeans.
The force said a man arrested on Saturday was released and no further action is to be taken against him.
It said patrols had been stepped up in the area over the weekend to reassure the local community.