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A former FBI assistant director said there is no doubt that comparisons between the recent Austin, Texas package explosions and the Unabomber case are appropriate.

Danny Coulson told "Happening Now" host Jon Scott that the intricate level of skill needed to craft the bombs without having them go off during delivery is very similar to Theodore Kaczynski's case in the 1980s and 90s.

Two people have been killed and at least two others have been injured in the three Austin explosions.

"The Unabomber's bombs were very complicated, they were mainly constructed of wood. They were very effective," Coulson said. "I think we have a similar situation here," he said of the recent explosions in Austin.

The first explosion happened March 2 and two more explosions occurred hours apart on Monday.

Kaczynski's bombs killed three and injured 23 others over a span of nearly 20 years. Coulson noted that the victims have been minorities, and the blasts have occurred in minority neighborhoods.

"I'm afraid it could be hate crime-related," he said.

Kaczynski was sentenced to life in prison in 1998, two years after he was tracked down by federal agents in a remote cabin in the woods of Montana. 

Watch the interview above.

UPDATE: A fourth explosion - believed to be connected to the three package bombings - injured two in a residential area on March 18. 

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