The Arizona Supreme Court building was evacuated on Tuesday following the discovery of a suspicious package containing homemade explosives in the facility’s mailroom. Authorities confirmed preliminary testing detected materials consistent with improvised explosive devices, prompting an immediate evacuation of the courthouse and surrounding parking areas.

No injuries were reported during the incident. Bomb squad units and hazardous materials teams responded swiftly to secure the perimeter and conduct a comprehensive sweep of the building. The package was removed after officials determined the site required further assessment before reopening.

Law enforcement stated the court building will remain closed until the investigation concludes and safety is verified. Authorities confirmed the package was sent to the mailroom, tested positive for homemade explosives, and the origin or intent behind its delivery remains under investigation.

The Bureau of Alcohol, Tobacco, Firearms and Explosives has deployed personnel to assist with the ongoing inquiry at the downtown Phoenix location near 15th Avenue and Washington Street.