Investigators in Berlin have detained a man whom they believe to be Luka Rocco Magnotta, a porn actor wanted in Canada for killing and dismembering someone and mailing body parts to political parties, a spokesman for the police in Berlin, Guido Busch, said Monday.

Authorities detained him after someone in an internet cafe told them she thought she recognized a customer in the cafe as the suspect, Busch said. The suspect offered no resistance when police took him into custody.

Magnotta is wanted on charges of first-degree murder in connection with the killing of 33-year-old Jun Lin, a Concordia University student from China, and threatening, among others, Canada's prime minister after mailing him a severed foot.

The case began last week when a package addressed to Prime Minister Stephen Harper arrived at his majority Conservative Party headquarters, and a hand was later found at a post office addressed to the minority Liberal Party, authorities said.

Authorities quickly traced the address on the packages to the Montreal apartment of Magnotta, where they discovered a torso in a suitcase in a trash bin.

And the crime, Montreal police say, was captured on a graphic video posted to the Web. It features a man - who authorities believe is Magnotta - killing another man, dismembering the corpse and performing sexual acts.

"We believe he filmed himself," LaFreniere said last week. "It's gross. ... This is a very deranged person. He is looking for attention, and he got it, but not in a positive way."

Not all the body parts have been recovered, and LaFreniere said forensic evidence and DNA were used to identify the victim as Jun.

Authorities believe Magnotta killed Jun on May 24 or May 25, posted the video, and on May 26 fled the country by plane to Europe.

That prompted Interpol, the global police agency, to alert authorities in 190 countries.