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,

What we knowDOC officials said, as of noon on Thursday, the Stillwater prison is on temporary lockdown but did not provide further details about what prompted the lockdown. Officials added that several staff members had been taken to the hospital "out of an abundance of caution" but did not say how many people were taken or the circumstances of the situation.

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