Texas bombs likely connected; no obvious links among sites

Authorities investigate the scene after multiple explosions in Austin on Monday, March 12, 2018. Police are responding to another explosion Monday, that badly injured a woman, hours after a package bomb killed a teenager and wounded a woman in a different part of the city. (Ricardo B. Brazziell/Austin American-Statesman via AP)

AUSTIN, Texas — Three package bombs left on doorsteps in suburban neighborhoods have exploded in less than two weeks in Texas’ capital city, killing two people, wounding two others and leaving investigators vowing to look at any possible explanation for a motive.