2 children, ages 1 and 4, shot on Tucson's south side

The shooting prompted a major police response in the neighborhood near West Valencia Road and Interstate 19. Much of the area was cordoned off Saturday night. Circumstances of the shooting, reported just after 7 p.m., remained unclear.

A 20-year-old man was arrested Wednesday and two others are facing charges in connection with a robbery that led to a deadly shootout Tuesday night at a north-side auto store, police said.

Carlos Peyron is facing charges of first-degree murder, attempted aggravated robbery, attempted armed robbery and kidnapping after he and three other men attempted to rob M&M Customs, which sells and installs car alarms, said Sgt. Fabian Pacheco, a Tucson Police Department spokesman.

One of the suspects, Noah Lopez, 18, was shot to death by an employee during the robbery.

Two other men, Toney Stith, 26, and Anthony Peyron, 19, were wounded in the shootout and will face charges once they are released from the hospital, Pacheco said.

All of the men are gang members, he said.

According to police, four men went into the business, at 3040 N. Stone Ave., and confronted an employee, forcing him into the back office.

The business owner, who was in the office, pulled out a shotgun and fired, wounding Anthony Peyron.

The suspects attempted to flee but encountered a locked door.

Lopez turned to the business owner and shot him in the forearm.

The employee retrieved a handgun from his tool kit and fatally shot Lopez, who turned his gun on the employee.

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Lopez was pronounced dead at the scene.

Stith was wounded in the lower extremities, while Carlos Peyron was hit in the back of the head with the stock of the shotgun.

The victims held the suspects at gunpoint until police officers arrived two minutes after the shooting was reported.

Contact reporter Jamar Younger at jyounger@azstarnet.com or call 573-4115.