We’ve just learned Michael Jackson was taken by ambulance to a hospital in Los Angeles … and we’re told it was cardiac arrest and that paramedics administered CPR in the ambulance.

He was picked up at his home around 20 minutes ago — we’re told his mother is on the way to visit him.

UPDATE: The 911 call came in at 12:21PM at his Holmby Hills home in L.A.

UPDATE: A Jackson family member tells TMZ Michael is in “really bad shape” and the brothers are headed to UCLA.

UPDATE: We just got off the phone with Joe Jackson, Michael’s dad, who says “he is not doing well.”

Source, Bauer-Griffin