On Friday, Santa Monica Police confirmed to Entertainment Weekly that they are investigation the injury as self-inflicted.
Emerson was one third of the sixties band Emerson, Lake and Palmer, in which he was a keyboard player alongside singer Greg Lake and drummer Carl Palmer. A statement on the band's official Facebook Page, confirmed his death. He was 71.
"We regret to announce that Keith Emerson died last night [Thursday] at his home in Santa Monica, Los Angeles, aged 71. We ask that the family's privacy and grief be respected," the statement read.
In a separate statement obtained by EW, Palmer expressed his sadness at the news.
"I am deeply saddened to learn of the passing of my good friend and brother-in-music, Keith Emerson," he said. "Keith was a gentle soul whose love for music and passion for his performance as a keyboard player will remain unmatched for many years to come."
Palmer also remembered the British musician as a "pioneer and an innovator," adding that he feels "very lucky to have known him and to have made the music we did."