Minneapolis live updates: DOJ launches investigation into Pretti killing, Deputy AG Blanche says

A person was shot in an incident involving U.S. Border Patrol in Arizona, a Pima County Sheriff's Department spokesperson told ABC News.

The shooting occurred early Tuesday morning, the Santa Rita Fire District said. Emergency responders provided first aid at the scene and the person was taken to a hospital in unknown condition, officials said.

The sheriff's office said it's working with the FBI and Customs and Border Protection.

MORE | Person shot in incident involving Border Patrol in Arizona, sheriff says

A person was shot in an incident involving U.S. Border Patrol in Arizona on Tuesday, a Pima County Sheriff's Department spokesperson told ABC News.

President Donald Trump spoke with reporters before departing for a political rally in Iowa and was asked if DHS Secretary Kristi Noem would step down.

"No," he responded.

President Donald Trump spoke with reporters before departing for a political rally in Iowa and was asked if DHS Secretary Kristi Noem would step down.

The president was also asked if Alex Pretti's death was justified.

"Well, you know we're doing a big investigation," he responded. "I'm going to be watching over it. I want a very honorable and honest investigation. I want to see it myself."

ABC News observed officers from Minnesota's Bureau of Criminal Apprehension on ladders assessing the crime scene and looking at markings on a wall above what appear to be bullet holes.

One agent also appeared to be taking photos of a CCTV camera directly above the scene of the shooting.

Former President Joe Biden said on social media on Tuesday that the immigration crackdown in Minneapolis "betrays our most basic values as Americans."

Former President Barack Obama said Sunday that the killing of Alex Jeffrey Pretti by a U.S. Border Patrol officer should be a "wake-up call to every American" and warned that "our core values as a nation are increasingly under assault."

Former President Bill Clinton's statement Sunday said that "over the course of a lifetime, we face only a few moments where the decisions we make and the actions we take will shape our history for years to come."

"This is one of them," Clinton said. "If we give our freedoms away after 250 years, we might never get them back."