Charlie Sheen is being investigated by LA Police Department for an alleged knife attack in a dental surgery while the actor was high on cocaine.
According to law enforcement officials, the 'Anger Management' star visited a dentist in LA when he reacted badly when a dental nurse placed a mask on him to give him nitrous oxide before a dental procedure, TMZ.com reported.
The nurse also allegedly told police that Sheen's bodyguard told the dentist that he was "high on rock cocaine".
Sheen apparently struck the nurse and threatened the dentist with a knife.
Sheen's representative later revealed that no one was injured and there was no knife involved in the incident.