Los Angeles, July 23 (DPA) Police and federal agents Wednesday raided the Houston offices of Michael Jackson's personal doctor Conrad Murray, in a search for medical records they believed would constitute evidence of manslaughter, the doctor's lawyer said.

Murray was the personal physician who was with Michael Jackson when the entertainer died suddenly of cardiac arrest last month at age of 50. Attention focused on the doctor in the immediate aftermath of Jackson's death when he dropped out of sight just as Jackson's family and investigators were seeking more information on the pop legend's last hours.

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 that can easily cause cardiac arrest if not properly administered. The results of a private autopsy carried out on behalf of the Jackson family have also not been revealed.

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.

'The search warrant authorised law enforcement to search for and seize items, including documents, they believed constituted evidence of the offence of manslaughter,' Ed Chernoff, Murray's attorney, said in a statement posted on his law firm's web site.

In an earlier statement, Chernoff said that Murray did not prescribe any drugs that may have caused the singer's death but that the investigators were seeking Jackson's medical records.