Ted Kaczynski, known as "the Unabomber," who attacked people with homemade bombs from 1978 to 1995, has been found dead in his jail cell at age 81.

Kaczynski killed 3 people and injuring 23 during his terroristic campaign against modern industrial society, which he sought to destroy as his stated purpose for the bombings.

He was arrested at his rural, off-the-grid cabin in 1996 after what is usually described as the longest and most expensive manhunt in American history.

Mr. Kaczynski traced a path that was singular in American life: lonely boy genius to Harvard-trained star of pure mathematics to rural recluse to notorious murderer to imprisoned extremist.

A spokesman for the Federal Bureau of Prisons confirmed the Unabomber was found dead in his cell early this morning. His cause of death was not immediately known.