The incident happened near Wilshire Boulevard and Bundy Drive just after midnight Wednesday.
According to police, the victim got into an argument with two men and tried to hit one of the suspects. Witnesses say that's when the suspect pulled out a pocket knife and stabbed the victim in the hand.
The unidentified victim was transported to a local hospital with minor non-life threatening injuries.
The suspects were last seen exiting the bus and heading down Wilshire Boulevard.
