"Unabomber" Ted Kaczynski found dead in prison cell

Theodore "Ted" Kaczynski, the man known as the "Unabomber" for a series of bombings targeting scientists, was found dead in his prison cell Saturday morning, a spokesperson for the federal Bureau of Prisons told CBS News.  

Kaczynski was 81 years old. He was found unresponsive in his cell around 8 a.m. at a federal prison in North Carolina, the spokesperson said. 

A cause of death was not immediately known.