An investigation is underway after floodwaters from Helene left two dead and four missing at a plastics factory in rural Tennessee — and surviving workers at the plant say they were told to keep working until it was too late.

Tennessee state authorities are investigating the company that owns a plastics factory where 11 workers were swept away by cataclysmic flooding unleashed by Hurricane Helene.

Eleven employees of Tennessee’s Impact Plastics were swept away by Hurricane Helene’s flooding—two have been confirmed dead and four are still missing.