The incident involves a HGV tanker which has overturned on the eastbound carriageway between junctions 12 and 14. We are currently awaiting confirmation of the substance the tanker was carrying.
As a result of the incident the M56 is currently closed in both directions between Junction 11 (Daresbury) and junction 14 (Hapsford).
A 1,800m cordon has been set up as a precautionary measure around the incidents, and residents in the Helsby, Hapsford, Frodsham and Elton are advised to stay indoors with their windows and doors closed.
Motorist who are caught in the tailbacks are advised to turn off their air conditioning ventilation system and close their windows
In addition to the M56 the Liverpool to Runcorn train line is also closed.
The closures are expected to remain closed for several hours and motorists are advised to avoid the area.
The driver of the tanker is believed to have suffered minor injuries.
More info will be added to the Cheshire Fire and Recsue Service website as it becomes available: