A teen was arrested and a second suspect is in the wind following an “ambush”-style shooting of an Arizona state trooper Thursday, authorities said.

Luis German Espinoza Acuna, 17, allegedly used an AK-47 to fire multiple shots at Arizona Department of Public Safety detectives in a residential area of Phoenix just before 9 a.m., the department said.

Troopers were in the area to execute a warrant on a wanted suspect, according to ABC News. The trooper who was struck was sitting in an unmarked vehicle but was wearing visible police attire, police said.

“There was no question, it was an ambush,” department director Col. Heston Silbert said at a press conference Thursday night. “He was identifiable as a police officer.”

Acuna was a passenger in a silver, four-door Infiniti that pulled up in front of the detective’s vehicle and honked the horn. He then got out of the car and allegedly “immediately opened up and opened fire” on the trooper, who also got out of his vehicle, Silbert said.

That trooper and another one who was nearby exchange gunfire with the alleged gunman. No one was injured.

The driver of the Infiniti fled as Acuna was arrested.

Police, who are still hunting for the second suspect, described the car as a 2008 to 2013 Infiniti G-37 with custom wheels and a temporary license plate.

The assault rifle was found near Acuna at the scene, authorities said.

A Blue Alert was issued Thursday, a rarely used system notifying the public of a suspect on the run following an assault on law enforcement.