The mutilated remains of motor mechanic Eduard Assylov, 37, were discovered by his horrified neighbours in Moscow.
Police initially thought the man, who was single, had been the victim of an attack by a love rival, given the severity and nature of the injuries.
But shortly after the victim’s 45-year-old roommate, who has not been named, confessed to the crime.
The man told officers he couldn’t stand the victim’s smoking, after moving to the capital from the city of Irkutsk in Siberia to work as a driver.
He said the pair had often argued about cigarettes, but that on this occasion he had gone “berserk” after he’d sparked up and had attacked him with a knife.
When the neighbours found out about the murder, Assylov’s head, arms and legs had been severed and his genitals were lying on top of a pillow soaked in blood.
A police spokesperson said: “The victim was found in the communal corridor of a dormitory where he had been renting a room.
“He had been stabbed nine times in the stomach and five times in the groin. In total he was stabbed more than 40 times before being dismembered.”
He added that the attacker had also cut off the victim’s ears and his left hand’s middle finger.
Shocked internet users were quick to express their horror at the attack.
One calling herself Irina Krot wrote: “I thought it was just me who hated smokers, but now I see I was wrong. Never thought I could feel pity for any of them.”
Boris Shkodov commented: “What a terrible and stupid death!!”
While Vera Berdik posted: “This is the most powerful anti-smoking advert I’ve ever seen.”
The accused has now been charged with murder and faces life in jail.
CREDIT: THE SUN