At least one worker was killed and a dozen injured when a corn mill exploded and burned in Wisconsin last night night, according to news sources. At last report, a search was being conducted for two employees who were still missing.

The blast at the multi-level Didion Milling plant in rural Cambria – about 80 miles northwest of Milwaukee -- occurred around 11 p.m., when 16 workers were at the site. The fire was contained by early this morning but officials said the building is a total loss.

Dozens of local emergency response agencies, including the Wisconsin Red Cross, rushed to the site.

According to its website, Didion Milling is a family owned agricultural processing business that has been storing, milling and transporting corn products for more than 40 years, “giving us the expertise that has helped us become a trusted leader in our industry today.”  The company also operates an ethanol facility.

The cause of the explosion is under investigation.