A CANNIBAL killer suspect was being hunted last night — months after The Sun warned Scotland Yard that he was dangerous.

We showed cops sick film of a live KITTEN fed to a snake and an email warning: “Once you kill and taste blood it’s impossible to stop.”

Luka Magnotta, 29, fled after a male pal - now believed to be a missing Chinese student he was in a relationship with - was chopped up and eaten in Canada.

Last night he was feared to be heading back to London while French cops have said they are actively hunting for him across the Channel.

Magnotta is believed to have written a chilling email to The Sun saying: “I’ll be back — and this time the victims won’t be animals.”

The terrifying message was sent after we quizzed him in London six months ago over a sick video of a KITTEN being fed alive to a giant snake.

We warned the Met Police then of our fears he would go on to kill — but they DROPPED the case, saying it was outside their jurisdiction.

Last night the twisted gay porn star was being hunted across the world after a severed hand and a foot were mailed to the offices of two political parties in Canada.

Today a former transexual girlfriend of the Magnotta told how the suspected killer was obsessed with Madonna and James Dean - and would "do anything to be famous".

And Interpol issued a “Red Notice” most wanted persons alert for Magnotta to its 190 member countries.

Reports in Canada now suggest Magnotta could even be travelling secretly disguised as a WOMAN.

The headless male torso was found in a suitcase dumped in rubbish behind Magnotta’s shabby apartment in Montreal.

Magnotta's victim is believed to be Chinese student Lin Jun, 33, according to reports.

Jun - from the east-central Chinese city of Wuhan - was reported missing on May 24.

Last night Magnotta was believed by cops to have fled back to Europe — possibly heading for London.

The baby-faced weirdo was placed on the FBI and Interpol “Most Wanted” lists — as police discovered a grisly video thought to be live footage of the murder.

The ten-minute film shows the victim being stabbed in a frenzy with an ICE-PICK, before being dismembered, sexually abused and his flesh EATEN with a knife and fork. We investigated bisexual Magnotta, 29, when he was in Britain last December after the vile kitten video was posted on the internet.

Two days later a misspelled email was sent to The Sun.

It told of the writer’s love for London and warned: “Well, I have to say goodbye for now. But don’t worry, in the near future you will be hearing from me again. This time, however, the victims won’t be small animals. I will however, send you a copy of the new video I’m going to be making. You see, killing is different than smoking... with smoking you can actually quit.

“Once you kill, and taste blood, it’s impossible to stop.”

Our reporters were convinced it was from Magnotta.

We had spoken to him after running a story on December 3 about a video showing a tiny black bundle of fur being fed to a PYTHON.

In another film, a second kitten was callously suffocated inside a plastic food bag. We were told creepy Magnotta was behind the sick footage. He turned up unannounced at our offices on December 8 to wrongly complain we were harassing him.

Police confirmed they had found a grisly video that could be of the murder taking place.

The ten-minute film, titled “1 Lunatic 1 Ice Pick”, shows a man having his throat slashed to New Order’s True Faith, which was also the soundtrack to serial killer movie American Psycho. It was posted several days ago on a sick “snuff” website.

Meanwhile today a Canadian transexual claimed she had a three-week affair with the suspected killer – who chillingly boasted he would do "anything to be famous."

Nina Arsenault told how she met Magnotta when he was just 18 and working as a stripper.

Nina said: "I first met him as Angel, but then he told me his real name is Luka and he also referred to himself as Rocco.

"He was my very first lover after I started living as a transsexual.”

Arsenault called Magnotta "very manipulative" and a "pathological liar".

She told  Toronto’s CityNews: “He would joke about killing animals. He would joke about killing people, that he wanted to kill his family.”