North Yorkshire Police and North Yorkshire Fire and Rescue, with support from other agencies, have commenced a joint investigation into the cause of the fire at the Newgen recycling plant at Sherburn in Elmet.
The situation continues to be under control with North Yorkshire Fire and Rescue expected to remain on site for the next two weeks or so.
The fire is reducing in size and the smoke plume is now much lighter in colour and dispersing in the wind.
Residents in Sherburn in Elmet and the surrounding area are still advised to avoid any contact with the smoke by remaining indoors as much as possible, ensuring windows and doors are closed as a precaution. This includes closing car windows, air vents and turning off air conditioning when driving.
A strong odour will be noticeable in the wider area during this period, which health officials say is not a cause for concern.
However, if you are concerned about the effects of smoke on your health, telephone your GP or call the NHS on 111 without delay.
Enquires are still in the early stages into the incident which was reported to the emergency services at 8.37am on Thursday 16 January 2014.
However, we can confirm that a 51-year-old local man has been arrested in connection with the investigation. Following questioning he was released on police bail pending further enquiries.
Anyone with information that could assist the investigation is urged to contact North Yorkshire Police on 101, select option 2, and ask for York CID. Or email Sinead.Brocken@northyorkshire.pnn.police.uk
Information can also be passed on anonymously to Crimestoppers on 0800 555 111.
Please quote reference number 12140008472 when providing details about this incident.