SALISBURY — A 31-year-old inmate was stabbed Monday at Piedmont Correctional Institution with a homemade device, prison officials said.

It is the third such violent incident this month.

The inmate, whose name was not disclosed, was involved in a fight with another inmate at the prison, located at 1245 Camp Road. The fight occurred about 3:20 p.m. Monday.

The injured inmate was sent to a local hospital for evaluation. His injuries were minor.

The incident is under investigation, said N.C. Department of Public Safety spokesman Jerry Higgins.

Higgins would not say what type of homemade weapon was used. He said the Salisbury Police Department was called to the scene. It’s not clear if the injured inmate or prison will press charges against the other prisoner.

There will be disciplinary action, Higgins said.

Higgins said he did not know if the stabbing is related to a stabbing earlier this month at the prison.

On Nov. 7, a 28-year-old prisoner was stabbed three times during a fight with another inmate. That prisoner’s injuries also were not receive life-threatening.

On Nov. 14, corrections Officer Clyde Motley was repeatedly punched by a prisoner.