![](http://speaking.serv166.zenutech.com/wp-content/uploads/arc-sawdust-300x150.jpg)
It could be months before investigators know what started an explosion and fire that killed two workers and injured 19 on Jan. 20 at the Babine Mill in Burns Lake, BC. One possible cause is combustible dust explosion, but it’s still too early to know for sure. The CCOHS says things that may “seem like harmless substances” – including sugar, coal, wood dust, flour – can “become the fuel for an explosion.”