SALT LAKE CITY — One person has died after a shooting that occurred Saturday as protesters marched through the streets of downtown Salt Lake City following a "No Kings" protest.

Police arrested a suspect for alleged murder, although he was not the person who fired the fatal shot.

In a press conference Sunday, Salt Lake City Police Chief Brian Redd confirmed that the victim, 39-year-old Arthur Folasa Ah Loo, passed away despite life-saving efforts.

According to witness statements, the "peacekeepers" noticed Gamboa separate from the crowd, go behind a wall and prepare the rifle. They went to confront Gamboa and told him to drop his gun, but he then raised the weapon in a "firing" position and began to run toward the crowd, according to police.

One of the peacekeeping members proceeded to fire three shots, striking both Gamboa and Ah Loo. That person is cooperating with the investigation. It's not yet known if he will face criminal charges.

Gamboa was arrested and faces a felony charge of murder. Police said he was shot by the peacekeeper, but his wound was only a minor "through and through" injury to his side.

Redd identified the suspect as 24-year-old Arturo Roberto Gamboa, who was found with an AR-15 and a gas mask in his backpack.

Two additional people were detained following the shooting. They were wearing high-visibility vests and armed, with Redd saying they were possibly part of the march's "peacekeeping" team.

According to witness statements, the "peacekeepers" noticed Gamboa separate from the crowd, go behind a wall and prepare the rifle. They went to confront Gamboa and told him to drop his gun, but he then raised the weapon in a "firing" position and began to run toward the crowd, according to police.

One of the peacekeeping members proceeded to fire three shots, striking both Gamboa and Ah Loo. That person is cooperating with the investigation. It's not yet known if he will face criminal charges.

Gamboa was arrested and faces a felony charge of murder. Police said he was shot by the peacekeeper, but his wound was only a minor "through and through" injury to his side.

"Arturo Gamboa was acting under circumstances evidencing a depraved indifference to human life, and knowingly engages in conduct that creates a grave risk of death to another individual and thereby causes the death of the other individual," the arrest report stated.