Paris Hilton's boyfriend Cy Waits has been attacked outside a courthouse in California.
The entrepreneur was escorting the socialite into court in Van Nuys, where she is testifying against Nathan Parada - the knife-wielding man who allegedly tried to break into her home earlier this year (11), when an unnamed onlooker lunged at him.
Tmz.com reports the attacker grabbed Waits by the neck and had to be dragged away by security men.
The man was detained by police.