LOS ANGELES - Guitarist Rafael Moreira, who has worked with Pink, Christina Aguilera and other pop stars, was defending himself when he struck a student with a guitar, the musician's attorney said.
Moreira was arrested Monday for investigation of assault with a deadly weapon following the confrontation at the Musicians Institute in Hollywood, where he teaches, said police Lt. Russ Wong.
The musician's attorney, Robert Hale, said Moreira struck the student, whose name has not been released, after the student became "unruly" following "constructive criticism" from the teacher.
"From what I've been able to determine, he crossed the line and Rafael was just simply protecting himself," Hale said. He said Moreira was released on bail Tuesday.
A witness who said he contacted security said he saw a person with a bloody face confront Moreira.
The guitarist, who graduated from the institute in 1998, is listed on its Web site as one of its "success stories." His profile notes he has toured with Pink as well as performed with Aguilera, Marc Anthony, Sisqo and Mya.
Moreira, who was born in the southern Brazil town of Cambara, also fronts his own rock band, Magnetico, and appeared on the CBS reality show "Rock Star: INXS."