UPDATE: The powder has been deemed harmless. It has been sent to a lab to be analyzed.
Las Vegas police have been called in to investigate a suspicious substance in a piece of mail that was received at the Regional Justice Center in downtown Las Vegas.
The incident was reported at 12:57 p.m. It is not known if the Regional Justice Center has been evacuated or not.
The ARMOR Unit was sent in to check out the situation.
This is a developing story. Check back for updates.