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Residents of Austin had been on edge ever since the bombings began March 2, killing two people and injuring at least four others.

The first three explosions involved packages left on porches, while a fourth, which injured two men, ages 22 and 23, on Sunday night, was detonated by a tripwire tied to an explosive device. A fifth package exploded Tuesday morning on a conveyor belt at a FedEx sorting facility near San Antonio that injured one worker.

Later Tuesday, an unexploded bomb was discovered at a FedEx facility in Austin, two sources told ABC News. That was the sixth device tied to the serial bomber -- five package bombs and the device tethered to the tripwire.

Conditt's family released a statement today saying they are \"devastated and broke by the news that our family member\" was behind the bombing spree.

\"We had no idea of the darkness that Mark must have been in,\" the statement reads. \"Our family is normal in every way. We love, and we pray and, we try to inspire and serve others. Right now our prayers are for those families who have lost loved ones, for those impacted in any way, and for the soul of our Mark.\"

A family friend, who asked not to be identified, told ABC News that Conditt was from a loving family.

\"PHOTO:
Loren Elliott/Reuters
PHOTO: Law enforcement personnel investigate the scene where the Texas bombing suspect blew himself up on the side of a highway north of Austin in Round Rock, Texas, March 21, 2018.
>

\"The family is a normal Christian family,\" the friend said. \"There was nothing going on with Mark when I knew him. I knew him as a teenager. He reminded me of every teenage boy. It was hard to get a smile out of him. He was home-schooled and part of a home-school community.\"

Officials at Austin Community College said in a statement to ABC News that Conditt attended the school from 2010 to 2012, but did not graduate.

Conditt worked as a sales and purchasing representative for Crux Manufacturing in Pflugerville, an outfit that makes semiconductor parts, but was fired for undisclosed reasons in August 2017 after four years of employment, the company said in a statement to ABC station KVUE-TV in Austin.

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