VIDEO: Sheffield park sealed off by police following major incident
Several police cars, two ambulance vehicles and the Yorkshire Air Ambulance were earlier called out to Lowedges at about 8pm this evening.
In the last hour they have also cordoned off part of nearby Greenhill Park.
The air ambulance has since left the area.
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Hide AdAn eyewitness said: "There are loads of police and ambulances here.
"I have heard that a teenage male has been stabbed and taken away in the air ambulance.
South Yorkshire Police and Yorkshire Ambulance Service has been contacted for comment and we are awaiting a reply.