Border Patrol Agent Shot, Killed in AZ [VIDEO]

UPDATE: The Border Patrol has identified the slain agent as 30-year-old Nicolas Ivie.

Three Border Patrol agents, patrolling a known drug corridor near the U.S.-Mexico border in Arizona on horseback, came under fire early Wednesday morning, leaving one dead and another wounded.

FOX News Radio's Jennifer Keiper reports:

Audio clip:

The officer who was injured has been airlifted to the hospital, and word is he has non-life threatening wounds.  The circumstances surrounding the shooting, not clear yet, as the search for the gunman continues.  A Border Patrol spokesperson tells FOX News Radio that it happened near Naco, Arizona.

The two agents were assigned to the Brian Terry Station that was just recently dedicated in honor of the Border Patrol Agent Brian Terry, who was killed almost two years ago.  That shooting prompted the probe into the ATF Fast & Furious gun-running operation.

Jennifer Keiper, FOX News Radio.

READ the official release from U.S. Customs & Border Protection on the shooting:

"Early this morning Tucson Sector Border Patrol agents assigned to the Brian Terry Station were involved in a shooting near Naco, Ariz. Preliminary reports indicate one agent has died from his injuries and another sustained non-life threatening wounds. The injured agent has been airlifted to the hospital. Names are being withheld pending notification of next of kin. More updates will follow as appropriate. The incident investigation is being led by the Federal Bureau of Investigation and the Cochise County Sheriff's Office."

READ a statement from the FBI on the investigation into the shooting:

"The FBI and the Cochise County Sheriff's Office are conducting a joint investigation into the shooting of Border Patrol agents near Naco, Arizona, on Tuesday, October 2, in the early morning hours. One agent died from his injuries and another, who sustained non-life threatening wounds, was airlifted to a local hospital. The investigation remains on-going."

READ a statement from AZ Gov. Jan Brewer on the shooting:

"Arizona has lost another Border Patrol agent.

"In the dark hours before daybreak, one agent was killed and another injured while on-duty along Arizona's southern border. It is believed they were responding to an alerted ground sensor in a remote area near Bisbee, a short distance north of the border. In a tragic coincidence, these agents were assigned to Brian Terry Station - newly-dedicated and named for a U.S. Border Patrol agent murdered under similar circumstances in Arizona less than two years ago.

"More recently, in May 2011, we lost two more agents - Eduardo Rojas, Jr. and Hector Clark - when they were killed in a vehicle accident while pursuing suspected drug smugglers near Gila Bend.

"What happens next has become all-too-familiar in Arizona. Flags will be lowered in honor of the slain agent. Elected officials will vow to find those responsible. Arizonans and Americans will grieve, and they should. But this ought not only be a day of tears. There should be anger, too. Righteous anger - at the kind of evil that causes sorrow this deep, and at the federal failure and political stalemate that has left our border unsecured and our Border Patrol in harm's way. Four fallen agents in less than two years is the result.

"It has been 558 days since the Obama administration declared the security of the U.S.-Mexico border 'better now than it has ever been.' I'll remember that statement today."

WATCH more on the death of a Border Patrol agent in AZ: