Emergency services were called to Dovestone Reservoir in Saddleworth this afternoon after reports of 'two injured people in need of rescue'.
Firefighters, police, ambulance, air ambulance, and two mountain rescue teams were called to the area just after midday today (Sunday, January 23).
A spokesperson from the The Greater Manchester Fire and Rescue Service said: "A significant multi-agency response attended the area around Dovestone Reservoir just after midday today, Sunday 23 rd January 2022.
"Firefighters, police, ambulance, and the mountain rescue team responded to reports of two injured people in need of rescue.
"Following a joint assessment of the incident by the agencies responding it has been scaled down, so firefighters have now begun to leave the area.
"The incident remains in the hands of the mountain rescue team and North West Ambulance Service."
It is not known yet the seriousness of the injuries.
The Oldham Mountain Rescue Team has said that it will provide a statement at a later date.