At least one person was killed and a dozen injured in the blast.
Though the majority of those inside were rescued or able to escape on their own, two are still missing. It was unclear on Thursday whether the blast occurred in that part of the facility. School officials wanted to be sure the danger was over on Thursday, he said. Authorities announced Thursday morning that the church would be a disaster reception center where Red Cross staff are on hand and family members of the victims are gathering. He said there is no danger to the public at this time, and no need for evacuation. The mill operates 24 hours a day to supply corn and ethanol to people around the world. "I was told that structure houses the lab and did have people staffing it at the time", Williams said. Two workers were treated and released. The district also said it will be making a determination regarding the location of its graduation ceremony on Friday, with an announcement to be made later as to the location.
The cause of the explosion has yet to be determined, and an investigation is already underway. OSHA hasn't cited the plant for anything since, the records show.
Emails sent to several company officials Thursday weren't immediately returned. The agency has six months to complete its work.
Multiple crews are responding to reports of an explosion in Columbia County.
The agency ordered the mill to correct the problem by April 2011. OSHA hasn't cited the plant for anything since. The small community is about 45 miles northeast of Madison.
Five of the injured were airlifted Wednesday night to the University of Wisconsin Hospital in Madison, UW Hospital spokeswoman Emily Kumlien said.
Four survivors have been taken to the facility's burn center while the other person is in the trauma unit/life support center. She declined to disclose any of the patients' conditions.