Though an official cause of death had not been released, London's The Sun reported that Moore was a casualty of a rock 'n' roll lifestyle, having choked on his vomit after a drinking binge.
Drugs and alcohol had notoriously long been a part of the band’s legend: Thin Lizzy lead singer Phil Lynott died in 1986 at just 36 years of age of pneumonia related to his heroin addiction.
http://www.nydailynews.com/entertain...otel_room.html
yep, natural causes