Emergency services are treating three children and an adult following a serious crash on the M66 this afternoon.
Two air ambulances, fire crews, paramedics and police have all been deployed to the scene between junction 3 for Pilsworth Road in Hollins to junction 4 for Simister Island.
The motorway has been closed in both directions to allow the air ambulance to land. Footage shows two helicopters landing on the opposite side of the carriageway.
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According to Greater Manchester Fire Service, three children and one adult have been injured. The nature of their condition has not been revealed at this stage.
Greater Manchester Police have been approached for more information. Drivers have been urged to stay away from the area as the motorway is expected to remain closed for some time.
Pictures from the scene show miles of tailbacks on the southbound side of the motorway, with drivers seen getting out of their cars as traffic came to a standstill.
Eyewitnesses have described seeing two air ambulances, multiple police cars, three fire engines and multiple paramedics from the North West Ambulance Service.
In a statement, GMFRS said: "A serious road traffic collision involving four vehicles has completely closed the M66 in both directions between junctions 3 and 4.
"Police, ambulance crews, the air ambulance, and firefighters are working together to help three children and one adult who have been injured. The motorway will remain closed while we work so please avoid the area and use alternate routes.
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