Unabomber Ted Kaczynski, 81, dies in US prison cell

Harvard-educated mathematician waged 17-year bombing campaign from isolated shack in Montana wilderness

Theodore Ted" Kaczynski, the Harvard-educated mathematician who retreated to a dingy shack in the Montana wilderness and ran a 17-year bombing campaign that killed three people and injured 23 others, died on Saturday. He was 81.

Branded the Unabomber" by the FBI, Kaczynski died at the federal prison medical center in Butner, North Carolina, Kristie Breshears, a spokesperson for the federal Bureau of Prisons, told the Associated Press. He was found unresponsive in his cell early on Saturday morning and was pronounced dead around 8am, she said. A cause of death was not immediately known.