Tommy Lee's son Brandon will not be charged for allegedly hitting his father during a fight last month.

The 21-year-old son of the Motley Crue rocker - whom he has with actress Pamela Anderson - were involved in a violent altercation last month which allegedly saw Brandon punch his father in the mouth, leaving him with a swollen lip.

And after it was reported that Tommy wanted to see his son charged for battery over the alleged fight, the Los Angeles County District Attorney's Office has told The Blast that they will not be pressing forward with the case.

According to the publication, the reason for dropping the charges are ''victim unavailability'', meaning Tommy changed his mind about helping the investigation.

Previously, a source had insisted the 'Kickstart My Heart' hitmaker wanted to make sure Brandon paid for his actions.

They said: ''You encourage what you tolerate, and he's not going to tolerate what Brandon did and that's why he wants the criminal case to keep moving along ... at least for now.''

At the time of the incident, it was claimed that 55-year-old Tommy's alcoholism was to blame for the violence after both Brandon and Pamela slammed his drinking habits, but Tommy later denied their claims.

He said: ''Do I drink more than the average Joe? Yes. Have I ever hurt my sons or acted out of turn with them because of my drinking? No. No matter how much people wanna pin me as this deviant alcoholic abuser, that isn't me. I'm a happy fun loving guy.''

After the altercation, Brandon released a lengthy statement in which he claimed he had been doing all he could to help his father through his alleged addiction to alcohol.

He said: ''I'm devastated at the events of the last several days that have been a result of my father's alcoholism.

''I've worked tirelessly organising an intervention and it's incredibly upsetting that it never came to fruition. I wanted my dad's hopeful sobriety and recovery to be a private family matter but, as a result of his accusations on social media, I feel forced to speak out. I have and will continue to cooperate with law enforcement as needed. I love my father and just want to see him sober, happy and healthy.''