- Austin explosions: ‘Serial bomber’ hunted after tripwire sets off 4th blast  NBCNews.com
- Investigators Say Austin ‘Serial Bomber’ May Have Used Tripwire In Latest Blast  NPR
- Austin police warn of ‘serial bomber’ after fourth explosion shows ‘higher level of sophistication’Â Â Los Angeles Times
- Allhands: What makes the Austin bombings so terrifying? It could happen to any of us  AZCentral.com
- After fourth Austin explosion, police warn of sophisticated ‘serial bomber’Â Â Washington Post
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