Texas serial bombing victims appear not to be linked: authorities

AUSTIN, Texas, April 9 (Reuters) - The victims of the Austin serial bombing attacks that killed two people last month do not appear to have been linked, a U.S. attorney said on Monday, adding that the bomber, who killed himself as police closed in, likely acted alone.

Bomber Mark Conditt, 23, an unemployed man from the Austin suburb of Pflugerville, died on March 21 after detonating a explosive device as police ran toward his vehicle in an Austin suburb.

"The investigation into motive and intent is ongoing. I have not seen information so far to believe that there is a common link between the victims," John Bash, U.S. attorney for the Western District of Texas, told a news conference.

Two African-American males were killed in the attacks that injured five people, including a Hispanic woman and two white men.

23 PHOTOS
Series of bombings in Austin, Texas and suspect Mark Conditt
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Series of bombings in Austin, Texas and suspect Mark Conditt
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, U.S., March 21, 2018. REUTERS/Loren Elliott TPX IMAGES OF THE DAY
Texas blast suspect Mark Anthony Conditt is seen in this undated handout photo released by Austin Community College in Austin, Texas, U.S. March 21, 2018. Austin Community College/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. NO RESALES. NO ARCHIVES. MANDATORY CREDIT
SUNSET VALLEY, TX - MARCH 20: FBI agents collect evidence at a FedEx Office facility following an explosion at a nearby sorting center on March 20, 2018 in Sunset Valley, Texas. A package, reported to have been shipped from this store, exploded while being transported on a conveyor shortly after midnight this morning at the sorting facility in Schertz, Texas causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas. (Photo by Scott Olson/Getty Images)
Law enforcement personnel investigate the home where Austin serial bomber Mark Anthony Conditt lived in Pflugerville, Texas, U.S., March 22, 2018. REUTERS/Loren Elliott
AUSTIN, TX - MARCH 20: Police respond after one person was injured by a package containing an incendiary device at a nearby Goodwill store on March 20, 2018 in Austin, Texas. Despite a heavy response of local and federal law enforcement officials at the scene, police have stated that they do not feel the incident is related to the recent series of package bombs that have been detonated in the city. (Photo by Scott Olson/Getty Images)
Pictured is the home where Austin serial bomber Mark Anthony Conditt lived in Pflugerville, Texas, U.S., March 22, 2018. REUTERS/Loren Elliott
SUNSET VALLEY, TX - MARCH 20: FBI agents collect evidence at a FedEx Office facility following an explosion at a nearby sorting center on March 20, 2018 in Sunset Valley, Texas. A package, reported to have been shipped from this store, exploded while being transported on a conveyor shortly after midnight this morning at the sorting facility in Schertz, Texas causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas. (Photo by Scott Olson/Getty Images)
ROUND ROCK, TX - MARCH 21: Austin Mayor Steve Adler speaks to the media near the location where the suspected package bomber was killed in suburban Austin on March 21, 2018 in Round Rock, Texas. The 24-year-old suspect blew himself up inside his car as police approached the vehicle. A massive search had been underway by local and federal law enforcement officials in Austin and the surrounding area after several package bombs had detonated in recent weeks, killing two people and injuring several others. (Photo by Scott Olson/Getty Images)
ROUND ROCK, TX - MARCH 21: The vehicle that the Austin package bomber, Mark Anthony Conditt, was driving when he blew himself up is towed from the crime scene along Interstate 35 in suburban Austin on March 21, 2018 in Round Rock, Texas. The 24-year-old Conditt blew himself up inside the SUV as police tried to take him into custody. A massive search had been underway by local and federal law enforcement officials in Austin and the surrounding area after several package bombs had detonated in recent weeks, killing two people and injuring several others. (Photo by Scott Olson/Getty Images)
A law enforcement member is seen down the street from the home where Austin serial bomber Mark Anthony Conditt lived in Pflugerville, Texas, U.S., March 22, 2018. REUTERS/Loren Elliott
AUSTIN, USA - MARCH 20 : Texas troopers take security measures near the site of an explosion in Austin, United States on March 20, 2018. (Photo by Marshall Foster/Anadolu Agency/Getty Images)
ROUND ROCK, TX - MARCH 21: The vehicle that the Austin package bomber, Mark Anthony Conditt, was driving when he blew himself up is towed from the crime scene along Interstate 35 in suburban Austin on March 21, 2018 in Round Rock, Texas. The 24-year-old Conditt blew himself up inside the SUV as police tried to take him into custody. A massive search had been underway by local and federal law enforcement officials in Austin and the surrounding area after several package bombs had detonated in recent weeks, killing two people and injuring several others. (Photo by Scott Olson/Getty Images)
Police and FBI officers guards the scene of an explosion in Austin, Texas, U.S., March 12, 2018. REUTERS/Sergio Flores TPX IMAGES OF THE DAY
AUSTIN, TX - MARCH 20: Sam Truitt holds his son Royce while speaking to the press about what he witnessed after a person was injured by a package containing an incendiary device at a nearby Goodwill store on March 20, 2018 in Austin, Texas. Despite a heavy response of local and federal law enforcement officials at the scene, police have stated that they do not feel the incident is related to the recent series of package bombs that have been detonated in the city. (Photo by Scott Olson/Getty Images)
Crime scene investigators and law inforcement gather evidence at the home of suspected bomber Mark Anthony Conditt on March 22, 2018 in Pflugerville, Texas. A man suspected of carrying out a series of bombings in the Texas capital Austin blew himself up on March 21, 2018, leaving behind a recorded video 'confession' that police said portrayed 'challenges in his personal life.' / AFP PHOTO / SUZANNE CORDEIRO (Photo credit should read SUZANNE CORDEIRO/AFP/Getty Images)
ROUND ROCK, TX - MARCH 21: Law enforcement officials search for evidence at the location where the suspected package bomber was killed in suburban Austin on March 21, 2018 in Round Rock, Texas. Mark Anthony Conditt, the 24-year-old suspect, blew himself up inside his vehicle as police approached to take him into custody. A massive search had been underway by local and federal law enforcement officials in Austin and the surrounding area after several package bombs had detonated in recent weeks, killing two people and injuring several others. (Photo by Scott Olson/Getty Images)
SUNSET VALLEY, TX - MARCH 20: FBI agents collect evidence at a FedEx Office facility following an explosion at a nearby sorting center on March 20, 2018 in Sunset Valley, Texas. A package, reported to have been shipped from this store, exploded while being transported on a conveyor shortly after midnight this morning at the sorting facility in Schertz, Texas causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas. (Photo by Scott Olson/Getty Images)
ROUND ROCK, TX - MARCH 21: Law enforcement officials search for evidence at the location where the suspected package bomber was killed in suburban Austin on March 21, 2018 in Round Rock, Texas. Mark Anthony Conditt, the 24-year-old suspect, blew himself up inside his vehicle as police approached to take him into custody. A massive search had been underway by local and federal law enforcement officials in Austin and the surrounding area after several package bombs had detonated in recent weeks, killing two people and injuring several others. (Photo by Scott Olson/Getty Images)
ROUND ROCK, TX - MARCH 21: Law enforcement officials search for evidence at the location where the suspected package bomber was killed in suburban Austin on March 21, 2018 in Round Rock, Texas. Mark Anthony Conditt, the 24-year-old suspect, blew himself up inside his vehicle as police approached to take him into custody. A massive search had been underway by local and federal law enforcement officials in Austin and the surrounding area after several package bombs had detonated in recent weeks, killing two people and injuring several others. (Photo by Scott Olson/Getty Images)
PFLUGERVILLE, TX - MARCH 22: A truck is towed from bombing suspect Mark Anthony Conditt's home in Pflugerville, Texas on March 22, 2018. (Photo by Carolyn Van Houten/The Washington Post via Getty Images)
AUSTIN, TX - MARCH 20: Deflated balloons sway in the wind in the yard of the house where the second bomb went off and killed Draylen Mason, 17, in Austin, Texas on March 20, 2018. (Photo by Carolyn Van Houten/The Washington Post via Getty Images)
AUSTIN, TX - MARCH 20: Deflated balloons sway in the wind in the yard of the house where the second bomb went off and killed Draylen Mason, 17, in Austin, Texas on March 20, 2018. (Photo by Carolyn Van Houten/The Washington Post via Getty Images)
SUNSET VALLEY, TX - MARCH 20: A closed sign hangs on the front door of a FedEx Office store following an explosion at a nearby sorting center on March 20, 2018 in Sunset Valley, Texas. A package, reported to have been shipped from this store, exploded while being transported on a conveyor shortly after midnight this morning at the sorting facility in Schertz, Texas causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas. (Photo by Scott Olson/Getty Images)
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In a video confession found on his cellphone, Conditt detailed how he made seven bombs. Five exploded, one was recovered before it went off and a seventh he detonated that killed him.

At this point, authorities do not intend to release the confession, voicing worry it could inspire others.

"The subject in the audio confessions says a number of statements that concern us. We just don’t want that to live forever on the internet,” said Fred Milanowski, special agent in charge of Houston Field Division for the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF).

Authorities on Monday also dropped a federal charge against the deceased bomber, involving receiving, possessing and transferring a destructive device, according to a criminal complaint.

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Package bomb explodes at FedEx facility in Schertz, Texas
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Package bomb explodes at FedEx facility in Schertz, Texas
SCHERTZ, TX - MARCH 20: FBI and ATF agents, and local officials update the media on their investigation outside a FedEx facility following an explosion on March 20, 2018 in Schertz, Texas. A package exploded while being transported on a conveyor shortly after midnight this morning causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas, about an hour's drive from Schertz. (Photo by Scott Olson/Getty Images)
SCHERTZ, TX - MARCH 20: FBI and ATF agents, and local officials update the media on their investigation outside a FedEx facility following an explosion on March 20, 2018 in Schertz, Texas. A package exploded while being transported on a conveyor shortly after midnight this morning causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas, about an hour's drive from Schertz. (Photo by Scott Olson/Getty Images)
SCHERTZ, TX - MARCH 20: FBI and ATF agents, and local officials update the media on their investigation outside a FedEx facility following an explosion on March 20, 2018 in Schertz, Texas. A package exploded while being transported on a conveyor shortly after midnight this morning causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas, about an hour's drive from Schertz. (Photo by Scott Olson/Getty Images)
SCHERTZ, TX - MARCH 20: Flags fly outside a FedEx facility following an explosion on March 20, 2018 in Schertz, Texas. A package exploded while being transported on a conveyor shortly after midnight this morning causing minor injuries to one person. The explosion is believed to be related to several recent package bombs that have been detonated in Austin, Texas, about an hour's drive from Schertz. (Photo by Scott Olson/Getty Images)
Schertz Police block off Doerr Lane near the scene of a blast at a FedEx facility in Schertz, Texas, U.S., March 20, 2018. REUTERS/Sergio Flores
Schertz Police block off Doerr Lane near the scene of a blast at a FedEx facility in Schertz, Texas, U.S., March 20, 2018. REUTERS/Sergio Flores
Schertz Police block off Doerr Lane near the scene of a blast at a FedEx facility in Schertz, Texas, U.S., March 20, 2018. REUTERS/Sergio Flores
Schertz Police block off Doerr Lane near the scene of a blast at a FedEx facility in Schertz, Texas, U.S., March 20, 2018. REUTERS/Sergio Flores
A Schertz Police officer speaks to a member of Schertz Fire Rescue on Doerr Lane near the scene of a blast at a FedEx facility in Schertz, Texas, U.S., March 20, 2018. REUTERS/Sergio Flores
Schertz Police block off Doerr Lane near the scene of a blast at a FedEx facility in Schertz, Texas, U.S., March 20, 2018. REUTERS/Sergio Flores
Schertz Police block off Doerr Lane near the scene of a blast at a FedEx facility in Schertz, Texas, U.S., March 20, 2018. REUTERS/Sergio Flores
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"Multiple other individuals were investigated for potential links to these destructive devices. None of those persons were deemed likely to be involved," a redacted arrest affidavit released on Monday said.

Two roommates of Conditt were questioned and released from custody.

Conditt's bombs, which injured five people in total, primarily targeted Austin. Two were shipped as FedEx parcels, which helped investigators unmask the bomber's identity.

The affidavit said the explosive devices shared commonalities, such as the delivery method, contents and the manner of detonation.

"All six explosive devices used shrapnel," the affidavit from ATF Special Agent Reynaldo Alatorre Jr. said.

(Reporting by Jon Herskovitz in Austin, Texas; Editing by Peter Cooney)

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