Ray Manzarek, the Doors co-founder and keyboard player who helped define the sound of the Sixties and early Seventies on such albums as Strange Days, Morrison Hotel, LA Woman and their eponymous debut, has died after a lengthy battle with bile duct cancer.

Manzarek, who was 74, passed away at the RoMed Clinic in Rosenheim, Germany on Monday.

Doors guitarist Robby Krieger, said: "I'm just glad to have been able to have played Doors songs with him for the last decade. Ray was a huge part of my life, and I will always miss him."

Drummer Jon Densmore said of his late friend: "It was like we were of one mind, holding down the foundation for Robby and Jim [Morrison, late Doors singer] to float on top of. I will miss my musical brother."