This story just keeps getting worse.
The explosion on Sunday night was apparently set off by a tripwire on the road, leading police to believe the bomber or bombers had “a higher level of sophistication, a higher level of skill” than authorities initially believed,*said Brian Manley, the interim Austin police chief. He also said this explosion marked an apparent shift in tactics after the three previous devices were left at people’s homes.
“What we have seen now is a significant change from what appeared to be three very targeted attacks to what was, last night, an attack that would have hit a random victim that happened to walk by,” Manley said. “So we’ve definitely seen a change in the method that this suspect … is using.”
The explosive device Sunday adds to the uncertainty and tension in Austin,*which has been on edge since previous*bombings killed two people and injured two others, one seriously. Authorities have seemed at a loss to explain who could be setting off these devices or why, saying only that the bombs*were sophisticated and that the attacks could*have been*motivated by racial bias, although they acknowledged that this is only a theory.
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