California's Attorney General Jerry Brown has confirmed that a serious investigation into the death of Anna Nicole Smith has been launched which include raids on her physicians' homes.

The late model/actress' psychiatrist, Dr. Khristine Eroshevich, is amongst those who have already been served with a search warrant (October 12) and according to Brown there will be more to come. 

At a press conference on Friday, the Attorney General said, "The
investigation started when I reviewed the fact that all these different dangerous drugs and controlled substances were part of the death of Anna Nicole Smith, and I learned that these were California doctors and California prescriptions."

Smith – whose death was ruled accidental - died of a fatal overdose in a Florida hotel room in February 2007.

Yet despite the ruling Brown isn't convinced there's no one to blame.

He explains, "To get a search warrant you need probable cause that a crime has been committed... If a judge issues a search warrant to go into somebody's home there's some serious evidence.

"I'm not going to speculate on what the charges would be, but we do know... that there's someone's who's dead and their body, upon investigation, is full of controlled substances and combinations of drugs that turned out to be illegal.

"We're looking into a number of possible violations."

Brown refused to reveal anymore detail about the investigation but other reports suggest that six California locations were raided on Friday morning, including the offices and homes of two doctors.

Detectives found 600 pills at the scene of Smith's death and according to reports 450 were muscle relaxants and 11 were prescription drugs.

Dr Eroshevich - who has already been served with a search warrant - was travelling with the actress/model in the days before she died.