Officials at the Sonoma Raceway are conducting an investigation after "piece of twine tied in what appeared to be a noose" was found on the property.
The noose, found hanging from a tree behind a former administrative office, was first spotted on Saturday.
"A Sonoma Raceway staff member discovered a piece of twine tied in what appeared to be a noose hanging from a tree on raceway property. Our staff, on-site business tenants and local law enforcement have been contacted and asked to share any information they may have. The incident is under investigation by the Sonoma County Sheriff’s Department," the raceway said in statement to SFGATE. "Sonoma Raceway takes this incident very seriously and is dedicated to operating a facility that is welcoming to everyone."
An email sent to staff and tenants by raceway President Steve Page said officials are reviewing surveillance footage. Anyone with more information or "any possible alternative explanation" is asked to contact Page.