Andrew Breitbart has died, according to the conservative blogger's website.
He was 43. Few details were available.
"With a terrible feeling of pain and loss we announce the passing of Andrew Breitbart," says a note on www.bigjournalism.com. "Andrew passed away unexpectedly from natural causes shortly after midnight this morning in Los Angeles."
Several Breitbart-affiliated websites made the announcement this morning that he died of natural causes in Los Angeles in the early morning hours.
His death was confirmed by Breitbart.com editor-in-chief Joel Pollak, who says he was at the hospital.
And CNN is reporting that Breitbart's attorney also confirmed the death.