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LOS ANGELES (AP) -- The lawyer for Michael Jackson's doctor says Los Angeles County coroner's investigators are seeking additional information from his client.

Ed Chernoff, who represents Conrad Murray, the physician who tended to Jackson as he was dying on June 25, has already been interviewed twice by Los Angeles police detectives. In a statement posted on his Web site late Tuesday, Murray said the coroner's office was seeking more information.

A cause of death has yet to be determined for the pop star.

Chernoff did not immediately return a message, but his spokeswoman Miranda Sevcik says the interview might happen Friday. She says Murray is currently in Las Vegas, where he has a medical office.

A message left at the coroner's office was not immediately returned.