Los Angeles, July 23 (DPA) Police and federal agents Wednesday raided the Houston offices of Conrad Murray, the personal physician who was with Michael Jackson when the entertainer died suddenly of cardiac arrest last month.

Though the results of a coroner's report are yet to be released, attention is focused on the hospital anesthetic Propofol, a strictly controlled drug usually administered intravenously which can easily cause cardiac arrest if not properly administered.

News reports said that up to a dozen agents of the Drug Enforcement Agency entered the Murray's medical office, armed with a search warrant, looking for medical records.

In a statement released Tuesday, Ed Chernoff, the lawyer representing Murray, said that Jackson's personal physician did not prescribe any drugs that may have caused the singer's death but that the investigators were seeking Jackson's medical records.

'The coroner wants to clear up the cause of death, we share that goal,' he said.