A teenage girl who was critically hurt passed away in a Warrington park.
At 15:13 GMT on Saturday, officers were called to Culcheth Linear Park in response to reports of a girl who had suffered serious injuries.
Despite calling for emergency services, she was pronounced dead on the spot. Her heirs have been notified.
Despite the fact that the investigating officers are aware of the online rumours, Cheshire Constabulary Det Ch Insp Adam Waller urged people not to speculate.
He said: “We are following numerous lines of enquiry to establish what led to the victim’s death, and local residents will see an increased presence of police officers in the area while we investigate this incident.
“At this stage, we do not believe there is a wider threat to anyone else; however, if you have concerns, please do speak to a local officer.”
An area has been cordoned off close to where she was found, but formal identification has yet to take place.
Charlotte Nichols, Labour MP for Warrington North, said she had spoken to the police borough commander and urged anyone who was nearby at the time or who has CCTV or dashcam footage or information that might help the investigation to contact police.
“I urge anyone with any information, no matter how small, to get in touch,” Det Ch Insp Waller said.