FOG BLOG U.S. LOG: NOTORIOUS CRIMINAL 'THE UNABOMBER' , TED KACZYNSKI, DEAD AT 81!

Notorious, vengeful, reclusive 'Unabomber' Theodore (Ted) Kaczynski dead at 81 No immediate word on cause of death in federal prison medical centre Theodore (Ted) Kaczynski, the vengeful bomber who killed three people in a series of attacks over a nearly two-decade span before his own relatives helped authorities identify him, has died. He was 81.

Kaczynski, known as the "Unabomber," died at the federal prison medical centre in Butner, N.C., Kristie Breshears, a spokesperson for the federal Bureau of Prisons, told The Associated Press.

He was found unresponsive in his cell early Saturday morning and pronounced dead at about 8 a.m. local time, she said. A cause of death was not immediately known.

Before his transfer to the prison medical facility, Kaczynski had been imprisoned at the so-called supermax federal prison in Florence, Colo.

After attacks at two Illinois universities and one on an American Airlines cargo hold in 1978-79, Kaczynski was given the nickname Unabomber by an FBI-led task force.