Andy Fraser has died aged 62.
The Free bassist passed away in California on Monday. The official cause of death has not yet been confirmed, but it is known that he had been fighting both cancer and Aids.
Fraser co-founded Free with Paul Rodgers in 1968 and went on to co-write much of their material, including 'All Right Now'.
Tributes have been pouring in from musicians around the world online, some of which you can see below:
Loosing Andy is very personal, no words, sad day. Paul pic.twitter.com/pNQRyroy0u— Paul Rodgers (@_paulrodgers) March 18, 2015
I am extraordinarily sad to hear of the passing of Andy Fraser. He was one of the greatest and I was proud to call him my friend.— JOE BONAMASSA (@JBONAMASSA) March 17, 2015
RIP my brother Andy Fraser.. Your work in FREE is timeless A truly amazing Bass Player & Friend Honored to have shared the stage with you— Glenn Hughes (@glenn_hughes) March 17, 2015
RIP Andy Fraser Free's iconic bass player and writer of Alright Now and others. He battled cancer and AIDS. A loss. pic.twitter.com/vRU9TGskTE— Paul Stanley (@PaulStanleyLive) March 17, 2015
You can hear a special edition of My Planet Rocks tonight at 10pm, featuring Andy Fraser and bandmate Simon Kirke, speaking to Mark Jeeves in 2008.