Ronnie Montrose, the influential guitarist known for session work with Edgar Winter, Van Morrison, and many others as well as his own groups Gamma and Montrose, has died at 64. His official site has this announcement:

He passed today. He’d battled cancer, and staved off old age for long enough. And true to form, he chose his own exit the way he chose his own life. We miss him already, but we’re glad to have shared with him while we could.

Read more right here.

UPDATE, 04.10.12: Montrose’s death ruled suicide.