World mourns pop star Michael Jackson

The circumstances of Michael Jackson's death Thursday were not immediately clear. Jackson was not breathing when Los Angeles Fire Department paramedics responded to a call at his Los Angeles home about 12:30 p.m., Capt. Steve Ruda told the Los Angeles Times. The paramedics performed CPR and took him to UCLA Medical Center (above), Ruda told the newspaper. Mark Ralston/AFP/Getty Images