A woman was the victim of a serious sexual assault at Latitude festival, police have said.
Suffolk Constabulary said officers were investigating the report of the attack at the festival on Saturday between 10pm and 11pm.
Specially trained officers are looking after the woman and the investigation is continuing.
This year's festival was headlined by Lana Del Rey, Stereophonics and George Ezra.
More than 40,000 people are thought to have attended the four day event at Henham near Southwold.