Greater Manchester Fire and Rescue Service are using a tactic to let the fire burn out in a controlled way.
Andrew Heywood told ITV Granada Reports: "It's large quantities of flammable material, paper, plastic that's been shredded and compacted...So there is a massive fireload in that building and it will continue to burn for days".
More top news
Burnley manager Sean Dyche has confirmed he is in talks with Joey Barton about bringing the free-agent midfielder to Turf Moor.
David Beckham and Sir Alex Ferguson joined mourners today at the funeral of Neville Neville, the father of ex-footballers Gary and Phil.
The 52-year-old contacted the dead soldier's family and claimed the murder was a conspiracy.