Glasgow Warriors scrum-half Niko Matawalu has been found not guilty of biting Munster's Donncha O'Callaghan during
Matawalu was cited for an alleged incident of foul play and appeared before an independent Pro12 disciplinary committee in Cardiff.
The committee said Matawalu's contact with O'Callaghan was "accidental".
"Nikola Matawalu is free to resume playing immediately," said a Pro12 spokesman.
"After a hearing lasting three-and-a-half hours, the committee found, on the balance of probabilities, that while Mr Matawalu's teeth had come into contact with Mr O'Callaghan's arm, causing injury, this contact was accidental and therefore not an act of foul play.
"Accordingly, the citing was dismissed."