Another officer was also struck and taken to the hospital, police said.
Officers were responding to an incident involving a large crowd at a home in Santan, District 4 in the community around 2 a.m. local time, when multiple gunshots were fired, according to the Gila River Police Department.
Six people were shot in total during the incident, including Officer Joshua Briese, who succumbed to his injuries at the hospital, the police said. Briese had been with the force for less than a year and was still in field training, according to the police.