Several Stillwater prison staff members were taken to the hospital Thursday following an incident that put the facility into a lockdown, Minnesota Department of Corrections officials said. “Several staff were taken to the hospital out of an abundance of caution,

Nine workers at a Minnesota prison were hospitalized Thursday after being exposed to unknown substances and becoming ill.

Minnesota Correctional Facility - Stillwater, the state's largest prison, is on temporary lockdown after several staff members were possibly exposed to synthetic drugs on Thursday.