Authorities say determining the explosion's cause will be complicated because heavy equipment was used to pick apart wreckage during the search for victims and survivors.
Jumbled wreckage complicates West Reading chocolate factory blast investigation witf.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from witf.org Daily Mail and Mail on Sunday newspapers.
Investigators looking for the cause of a deadly explosion that leveled part of a Pennsylvania chocolate factory are facing an even more difficult task as they.