A 14-year-old boy and a 31-year-old man have been arrested on suspicion of raping a young woman at Reading Festival.
The victim, 19, claims she was attacked in a caravan on the festival traders' site on Thursday night after having met the pair near an ice cream van.
The boy, from Surrey, and man, from London, are being held in custody, Thames Valley Police said.
Chief Inspector Dave Parker said: "There is currently a scene watch in place and I would like to reassure those attending the festival that crime levels remain low and crimes of this nature are very rare."
Police said there had been 21 arrests at the festival, where Arctic Monkeys are headlining, since Wednesday for drugs and theft offences.