LITTLE ROCK, Ark. (AP) - Arkansas prison officials say an inmate has died after being hospitalized with a head injury in an incident being investigated by state police.

The Department of Correction says 34-year-old James Walker was pronounced dead Wednesday at a hospital. On Tuesday he was taken by ambulance from the Cummins Unit in Grady to an area hospital.

Prison officials have said it was unclear if the injury was the result of a fall or an assault.

The Department of Correction says it and state police are conducting investigations.