Residents in parts of Cheshire have been advised to stay indoors as a result of an overturned tanker .
The tanker which overturned on the M56 eastbound towards Manchester at Junction 14 shortly before 4pm is thought to be spilling liquid across the road.
Police have now updated to say the safety cordon has been reduced to 400m.
Residents in Plover Lane in Helsby are now advised to stay indoors.
Motorist caught in the tailbacks are also advised to turn off their air conditioning ventilation system and close all car windows.
The M56 is currently closed in both directions between junctions 11 and 1 and is expected to be blocked for several hours.
Cheshire Police are awaiting confirmation of the substance the tanker was carrying and have advised motorists to avoid the area.
In addition to the M56 closure, the Liverpool to Runcorn train line is also closed.
The driver of the tanker is believed to have suffered minor injuries.
Cheshire Police, Cheshire Fire and Rescue Service and the ambulance service are currently at the scene.
A spokesman for Cheshire Constabulary said officers were on their way to the scene of the incident of an overturned petrol tanker between near Clifton Bridge between junctions 14 and 12 at 15.47.
A spokesperson for Cheshire Fire and Rescue Service confirmed nobody is trapped in the overturned tanker.
The spokesperson said: “Fire and rescue crews are at the scene of a road traffic collision involving a tanker which has overturned.
“A cordon has been set up while emergency crews deal with the incident.”