Latest Austin blast may have been triggered by tripwire, police say

  1. Latest Austin blast may have been triggered by tripwire, police say  CNN
  2. 2 injured in 4th recent explosion in Texas capital  ABC News
  3. Austin explosions: Police investigating blasts ask residents to stay inside  NBCNews.com
  4. Fourth explosion this month injures two; this time in Southwest Austin  Austin American-Statesman
  5. Fourth Austin package explosion this month possibly detonated by tripwire, leaving 2 injured, police say  Washington Post
  6. Full coverage