Mexican authorities say they have arrested two suspects in Tuesday's killing of a Border Patrol agent in Arizona, Reuters reports. Nicholas Ivie, a 30-year-old father of two, was shot dead and a colleague was injured while responding to a tripped ground sensor. Mexican officials say the suspects were captured during a military operation a few miles away from the shooting site. Arizona Gov. Jan Brewer, a frequent critic of President Obama's immigration policy, said the shooting highlighted " the federal failure and political stalemate that has left our border unsecured and our Border Patrol in harm's way."