Los Angeles, July 28 (DPA) Police raided the home of Michael Jackson's personal doctor Tuesday, tightening their focus on the physician who reportedly gave the late superstar sedatives that may have killed him.

The raid of the Las Vegas home of Conrad Murray came a day after sources in the investigation told US news media that investigators believe Murray gave Jackson a dose of the hospital anesthetic propofol hours before Jackson died of cardiac arrest.

Celebrity website TMZ.com, which is known for its excellent police sources in Los Angeles, reported that Murray told investigators he gave Jackson propofol, and that authorities believe he simply wasn't paying attention when Jackson's heart stopped.