Sheriff’s deputies in Santa Rosa, Calif. shot and killed a 13-year-old boy who was holding a pellet gun that resembled an AK-47 assault rifle on Tuesday.

In a press conference Wednesday, Lt. Paul Henry of the Santa Rosa Police Department said that two Sonoma County Sheriff’s Deputies were patrolling a neighborhood when they spotted Andy Lopez, 13, carrying what they said appeared to be a rifle. Henry said that officers called for backup and repeatedly ordered Lopez to drop the weapon. Lopez reportedly turned towards the officers and one of them opened fire. Lopez was pronounced dead at the scene.