James Holmes appears in court to be formally sentenced, when victims and their families were given the opportunity to speak about the shooting and its effects on their lives, Aug. 24, 2015. 
Photo by RJ Sangosti/The Denver Post/Getty

Aurora movie theater shooter James Holmes assaulted in prison

Officials say an inmate assaulted theater shooter James Holmes and a security officer at the Colorado State Penitentiary.

Adrienne Jacobson, a spokeswoman for the Colorado Department of Corrections, told The Denver Post that the inmate lunged at Holmes and took a few swings at him while the officer was escorting Holmes through a hallway on Oct. 8. Holmes was not injured.

Jacobson told The Associated Press that the 27-year-old inmate accused of attacking Holmes will be disciplined during a hearing inside the prison.

Holmes is allowed to spend four hours in a day hall. No other inmates are in his cellblock.

A judge in August sentenced the 27-year-old to life in prison without parole for killing 12 people and wounding 70 others at a movie theater in suburban Denver in July 2012.

This article originally appeared on NBC News.com.

Aurora, Colorado, Gun Violence and Prison

Aurora movie theater shooter James Holmes assaulted in prison