A man was previously questioned in relation to the incident
A boy has been arrested by police investigating sex attacks on two six-year-old girls at the Legoland theme park in Berkshire.
He was questioned about what happened at the Castaway Camp in the Pirate Shores area of the attraction in Windsor on 11 August, before being released on bail until 2 December.
A spokesman for Thames Valley Police said: "The offence happened at Castaway Camp in Pirate Shores between about 12.15pm and 12.30pm on Thursday August 11 this year."
"The offender touched the victims, two six-year-old girls, inappropriately."
"This morning, police officers from Thames Valley Police arrested a boy in connection with the offence. He has been released on police bail."
"This is remains a live investigation and we continue to appeal for the public's help. If you have any information about the offences please call 101 and quote reference number 705."
A man aged 22 who was previously arrested in connection with the assault was released without charge. When the incident was featured on the BBC's Crimewatch programme it resulted in 80 calls from the public.