Public Information Officer Shane Cartmill, with the State Fire Marshal’s Office, says an official ruling regarding the fire was made this week.
He says investigators noted that they did not find any evidence of a crime.
Cartmill says even though the cause has been ruled undetermined the case still remains open.
The fire was reported the evening of November 27th of 2011.
The company announced plans to relocate plant operations to Battle Creek Michigan last month.
Janesville Acoustics is a leading global producer of acoustical and thermal fiber insulation and molded fiber products and opened the Newcomerstown facility in 2000.