Police are appealing for information following a sexual assault of two girls at Legoland Windsor Resort.
Thames Valley Police said the offence happened at Castaway Camp in Pirate Shores, between about 12.15pm and 12.30pm on Thursday.
The offender touched the victims, two six-year-old girls, inappropriately, it said.
The offender is described as a white man, in his teens or early twenties, possibly under 5ft 8ins.
He was wearing dark-coloured slim fitting trousers, a dark-coloured T-shirt, and trainers.
Investigating officer, Det Insp Penny Mackenzie of the Child Abuse Investigation Unit, said: "I would ask anyone who visited the Legoland Windsor Resort yesterday, especially if you went to Castaway Camp in Pirate Shores, to check any photographs from your trip to see if you recognise anyone matching the offender.
"Also, if you recognise the offender’s description or have some other information, no matter how insignificant you think it is, we want to hear from you."
It asked visitors to email [email protected] with the information you have and a contact telephone number.
Alternatively, visitors can call 101 or visit their nearest police station, quoting reference number URN 705 12/08.
"I would like to reassure the local community and visitors to Legoland that such offences are extremely rare and that we are working closely with Legoland to identify the suspect," added Det Insp Mackenzie.
"If you do not want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111. No personal details are taken, information is not traced or recorded and you will not go to court."
A spokeswoman for Legoland said its staff acted swiftly and immediately called the police.
"The safety and security of the families enjoying a day out with us is our number one priority," she said.
"We are now working closely with the police in assisting them with their investigation. Nothing of this nature has ever taken place at the Legoland Windsor Resort before and we are deeply shocked by the incident."
