By AZPM Staff and The Associated Press

Gov. Jan Brewer said Tuesday in the wake of a Border Patrol agent's killing in Southern Arizona that she is angry at the "political stalemate that has left our border unsecured."

Brewer has been a staunch advocate of a secure border, blaming the Obama administration and the federal government for not providing the proper resources.

Other reaction to the slaying of agent Nicholas Ivie near Bisbee a few miles north of the U.S.-Mexican border included Homeland Security Secretary Janet Napolitano ordering all flags flown by her department at half-staff.

Napolitano, who was Arizona governor before Brewer, says federal authorities will track down those responsible for the shootings and "bring them to justice."

U.S. Sen. John McCain says the shootings "are a tragic reminder of the threats that Border Patrol agents face every day in the line of duty."

U.S. Rep. Ron Barber, D-Ariz., in whose district the killing occurred on Tuesday, called for greater efforts to secure the border.

"This is a powerful reminder that our borders are far from secure and that every day the courageous men and women of the Border Patrol put their lives on the line while protecting the citizens of Arizona and the United States," Barber said in a statement released by his Tucson office.

U.S. Rep. Jeff Flake, R-Ariz., a candidate for U.S. Senate, called on the federal government to commit more resources to the border.

"Our thoughts and prayers are with the agents' families at this difficult time," Flake said in a statement. "Violence along Arizona's border cannot be tolerated by the federal government any longer. The federal government must commit the necessary resources to secure the border, because that's simply not happening right now."