Sacramento police say two or three Asian male suspects assaulted Stone late Wednesday night. They immediately fled the scene in a 2009 - 2012 dark gray or black Toyota Camry.
Stone was out with friends at an area club when a physical altercation happened just after midnight near 21st and K streets, which led to the stabbing.
Police said this was not a random act, but believed to be related to a night club incident.
A surveillance video at A&P Liquor on 21st street captured the group fighting in the middle of the street, but it does not clearly show faces of the suspects.
ABC News has learned Stone may have been protecting a friend at the time of the stabbing.
Investigators say the assault was not a terrorist attack, and alcohol is believed to be a factor.
