A 47-year-old man was killed and his 18-year-old nephew was injured in what authorities said was an “unprovoked” shooting at an Arizona RV dealer.

The suspect, identified as Bruce Alvin Hansberry, was taken into custody Monday night, hours after he allegedly fled deputies and hid in the desert.

The shooting happened around 5:15 p.m. Monday at Desert RV in Whetstone, about 65 miles southeast of Tucson. Cochise County Sheriff Mark Dannels said Hansberry walked into the business armed with an AR-15 rifle and shot several employees.

Robert Lizarraga, of Sierra Vista, died at the scene. His nephew Jordan Barajas, of Huachuca City, was injured and flown to a hospital where he remains in critical condition, Dannels said in an update on Tuesday morning. Both worked at Desert RV.

The business owner had a firearm and shot at the suspect as he fled and got into a vehicle parked nearby. Dannels said the suspect eventually abandoned the vehicle and ran into the desert while still armed.

Deputies lost the suspect, who was in the military and is listed as a disabled veteran, in the desert, according to the sheriff.

Nearby highways and interstates were closed and residents were told to shelter in place as multiple local, state and federal agencies searched for him. He was located around 10 p.m. hiding in a desert area east of Highway 90, the sheriff said.

Dannels said the suspect did not know the victims and had visited the dealership twice “as a customer” in the hours before the shooting.

“He left, no incidents, no disturbances or nothing,” the sheriff told reporters. “He just came back. From my understanding, one of the mechanics who work on our vehicle, [the suspect] just shot him and it continued from there. I don’t know what provoked him.”

Hansberry was booked into the Cochise County Jail on charges of first-degree murder, attempted first-degree murder and child abuse. The child abuse charge stems from investigators locating an infant child who was left alone at his residence.

It’s not clear if Hansberry has obtained an attorney.

A motive remains unclear.