From TVNewser:

The New York Times is reporting Tim Russert, NBC's Washington bureau chief and moderator of Meet the Press, suffered a heart attack and died this afternoon.

Around 1pmET this afternoon, Russert was conducting a political Q&A on MSNBC.com. We're told Russert collapsed while in the tracking booth at the Washington bureau. Russert was 58 years old.

Russert is the author of the bestselling Wisdom of Our Fathers: Lessons and Letters from Daughters and Sons, and Big Russ and Me.

We'll miss your wisdom, Russ.

UPDATE from Gina Centrello, president and publisher of Random House Publishing Group

We are heartbroken to learn of the untimely death of Tim Russert. He was a consummate professional, and brought enormous energy and spirit to everything he did. Working with him on WISDOM OF OUR FATHERS was a great joy for all of us. Our thoughts and prayers are with his family.