Four boys aged between 12 and 14 have been arrested on suspicion of raping a young girl near a car park in Rochdale.
Officers were called to reports of a rape near a Morrisons supermarket in Newbold at around 6pm on Saturday, Greater Manchester Police said.
The teenagers, a 12-year-old, 13-year-old and two 14-year-olds, were arrested and remain in police custody.
The young female victim is currently being supported by specialist officers and a crime scene remains in place as officers continue their investigation.
An area of land near Newbold Metrolink station has been cordoned off.
A force spokesman said: “A scene remains in place as officers continue their investigation.
“If you or someone you know has been raped or sexually assaulted, we encourage you not to suffer in silence and report it to the police, or a support agency so you can get the help and support available.”
John Hogkinson, 80, who lives directly next to the crime scene, told Manchester Evening News: “The police came but we didn’t hear anything.
“We were shocked because it’s so quiet around here. I’ve lived here for 17 years and I’ve never heard of anything like this. It’s awful.”
Lynn Davies, who lives by the cordon, told the paper: “I knew something had happened. The police came last night knocking on to ask if we had seen anything.
“It makes my skin crawl. It’s bad enough when it’s an adult, but children?”