Police are appealing for witnesses after a fire destroyed an industrial unit in Blackburn.

Officers were called by the fire service to Witton Industrial Park to reports of a fire at around 7.45pm on Saturday (April 6).

The fire has since been extinguished, but the building, believed to be a mattress factory, will have to be demolished due to the extent of the damage.

A joint investigation between police and the fire service has begun to find the cause of the fire and anyone who may be responsible for starting it.

A police spokesperson said: "We're asking that anyone who has CCTV or dashcam footage of Witton Industrial Park between 6.45pm and 7.45pm to get in contact with us.

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"If you witnessed the fire or anything suspicious around that time, please get in touch.

"Call 101, quoting log 1244 of April 6."