LINCOLN, Neb. (AP) — A Nebraska State Penitentiary inmate is recovering after being stabbed in the neck by a fellow inmate.

Media reports  that 31-year-old Adam Sommer is expected to recover from the Wednesday assault.

The Nebraska State Patrol is investigating the attack on Sommer, who is imprisoned for first-degree murder.

A homemade knife was recovered after the assault at the prison in south Lincoln, and a suspect has been identified. Officials would not identify the suspect, but they say he has been separated from the rest of the prison population.

Sommer is serving a life sentence out of Douglas County for the 2004 killing of an Arizona woman.