ALL traffic is being held on the M61 just outside of Bolton, creating long delays.
It follows a crash on the Northbound section of the motorway between Junction 5 for Bolton and Westhoughton and Junction 6 for Horwich.
A spokesman for the North West Motorway Police has confirmed that officers are being sent to the scene.
Fire crews have also been called.
It is not yet known whether anyone was injured in the crash.
UPDATE: As of 9.10am the damaged vehicles have been moved and all traffic released. Some delays continue.