Firefighters are tackling a "significant" blaze at a food factory in Inverclyde, which has led major delays for drivers on the A8.

The fire broke out at the McKechnie Jess plant on Port Glasgow Road in Greenock on Wednesday at about 3.20am.

They are still at the scene hours later with the roof of the factory reportedly collapsing.

Around 30 firefighters and six appliances went to the scene of the meat manufacturer to try to tackle the blaze.

There are no casualties, according to a Scottish Fire and Rescue Service spokeswoman.

She said: "Around 30 firefighters are currently tackling a significant fire at a Greenock factory.

"It was 3.22am when the alarm was raised on Wednesday. There are no casualties."

It has caused major disruption for commuters with the A8 closed in both directions between Gibshill Road and Bogston.

A diversion has since been put in place alone the Newark roundabout, the A737 and the A760.

Another road, via Kilmacolm, is closed for maintenance with Traffic Scotland tweeting "police advising the back roads moving at [snail's] pace".

Police Scotland also confirmed the diversion roads were closed to HGVs with Inverclyde Council adding "disruption expected to last until afternoon".