As we have previously reported, Emerson's death is being investigated as a suicide. The Santa Monica Police confirmed that the legendary keyboardist suffered a single gunshot wound to the head, but his cause of death is still under investigation.

Many musicians including Peter Frampton, Paul Stanley, Mike Portnoy and Billy Sheenan took to Twitter to share their thoughts on the late prog musician.

Dear Keith Emerson has left us too soon. Many great memories a truly gentleman. Rest in peace.- Peter Frampton (@peterframpton) March 12, 2016

RIP KEITH EMERSON. I saw ELP as a teen. Emerson was swagger&daggers stabbing the Hammond. THAT was prog with an edge https://t.co/yx7bWFaBJB- Paul Stanley (@PaulStanleyLive) March 11, 2016

Wow...I am absolutely stunned over hearing of Keith Emerson's passing. He was truly a Prog pioneer. This year's been absolutely devastating- Mike Portnoy (@MikePortnoy) March 11, 2016

Keith was the Jimi Hendrix of keyboards...this is another devastating loss to the Prog community #RIPKeithEmerson https://t.co/3tii4vMYWA- Mike Portnoy (@MikePortnoy) March 11, 2016