Congestion was building in the surrounding areas, including Brookway, Clough Lane, Mossley Road, High Grove Road, Church Road and Oaklands Road.
A statement on the GMP Saddleworth & Lees Facebook page read: "Accident - Road Diversions.
"An accident has taken place at the junction of Oldham Road and Mossley Road - Farrars Arms junction.
"Please avoid the area as Oldham Road past the Farrars is closed and you can't access.
"Diversion to go over Scouthead or via Bottom Mossley."
