The portion of the plant that was affected was used to slaughter chickens, reports Reuters. An Occupational Safety & Health Administration spokesman said the agency has opened an investigation.
Tyson said that it has set up a temporary medical clinic at the plant this week to conduct follow-up evaluations with affected employees. Additional human resources staff and chaplains have also been brought in.
"Our team members are the most important part of our business, so we're doing everything possible to help them through this difficult time," Tyson spokesman Gary Mickelson said.