Keith Emerson, the co-founder and keyboardist of progressive rock group Emerson, Lake and Palmer, has died aged 71, according to his former band mates.

"We regret to announce that Keith Emerson died last night at his home in Santa Monica, Los Angeles," read a statement on the band's Facebook page.

Yorkshire-born Emerson was one of the top keyboardists of the prog rock era.

He died of a self-inflicted gunshot wound to the head, Santa Monica police confirmed to the BBC.

His death was being investigated as a suicide, police added.

A police spokesman said Emerson's body was found in the early hours of Friday morning by his girlfriend Mari Kawaguchi at their flat in the Californian city.

Former band mate Carl Palmer said: "I am deeply saddened to learn of the passing of my good friend and brother-in-music, Keith Emerson.

"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.

"I will always remember his warm smile, good sense of humour, compelling showmanship, and dedication to his musical craft."