Ted Kaczynski, who became known as the Unabomber after making 16 bombs that killed three people, has died, according to a Federal Bureau of Prisons spokesperson.

Kaczynski was discovered in his cell Saturday morning, officials said.

He was 81.

He had been in a maximum security facility in Colorado but was moved to a medical facility in North Carolina in December 2021 because he was in ill health.

He went almost 20 years without being captured and is considered the most prolific bomber in American history. The explosives he made also injured two dozen victims.

Kaczynski was arrested in 1996 after his brother got suspicious and told authorities to check him out.

With Post wires