CROWLEY, Colo. (AP) -- A female kitchen employee was killed and another was seriously injured Monday in a disturbance involving an inmate while breakfast was being prepared at a state prison in southeast Colorado.

Colorado Department of Corrections spokeswoman Alison Morgan said the inmate was subdued, and the Arkansas Valley Correctional Facility in Crowley was put on lockdown. The prison 45 miles east of Pueblo houses about 1,000 male prisoners.

The names of the victims weren't immediately released. The wounded employee was listed in critical condition late Monday at a hospital in Pueblo.

Gov. John Hickenlooper issued a statement saying state officials were "doing all we can to support the families and employees impacted by this incident."