Yesterday afternoon, Dean Ween posted on his Group’s Facebook Page that he just heard that Gary “Dr. Know” Miller, the guitarist of DC hardcore icons Bad Brains, has been hospitalized and is on life support.

Miller, 57, has been with the band throughout their career. Several artists have taken to social media to express their support and respect for the guitarist and his music, including this tweet from Mountain Goats that calls Miller “one of the most important players of heavy music ever.”