Authorities confirmed the 24-year-old gunman acted alone during the shooting at an Idaho In-N-Out restaurant. The attack was slowed when an off-duty state trooper and a private citizen returned fire, according to law enforcement officials.

The incident occurred at the popular burger chain location where the shooter opened fire. Both the off-duty trooper and the armed civilian engaged the suspect, preventing further casualties. Their quick response has been credited with limiting the scope of the violence.

Investigators continue to examine the shooter's background and motive. No additional suspects are being sought in connection with the attack. The restaurant remains closed as authorities process the scene.