Officials shared an update on the Stillwater prison lockdown after nine staff members were hospitalized following an exposure to an unknown substance.

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.

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,