TEXARKANA, Ark. (AP) — Authorities in south Arkansas say a corrections officer has died after she was attacked by an inmate at a county jail. Another jail employee was injured.


The attack happened Sunday afternoon at the Miller County jail in Texarkana, on the state’s border with Texas. The Miller County Sheriff’s Office says correctional officer Lisa Mauldin died at a hospital and another officer, Demaris Allen, was injured and taken to a hospital in Little Rock.


The sheriff’s office did not describe the attack or say what prompted it, but authorities say the jail is now secure and on lockdown. Arkansas State Police is investigating.


The inmate’s name has not been released.


Mauldin is the fourth correctional officer to be killed this year in an incident involving an inmate, according to the Officer Down Memorial Page , a nonprofit organization that tracks law enforcement deaths. In September, an inmate fatally stabbed an officer at a prison in Alabama, and in July, a correctional officer was attacked and killed by an inmate in Abilene, Texas. In Pennsylvania, a corrections officer and an inmate who were scuffling smashed through an elevator door and fell to their deaths in July.