Members of Arizona's congressional delegation are calling for increased federal attention to making the U.S.-Mexico border more secure after an Arizona border agent was killed Tuesday morning.

Agent Nicholas Ivie was killed and another agent was wounded in a shooting that is still being investigated. Ivie's death marks the second death of the U.S. border agent in two years; agent Brian Terry was shot and killed in 2010, which eventually led to an investigation into whether weapons that the U.S. allowed to be sent into Mexico were used in that shooting.