Notes were included in mailed packages containing body parts after the videotaped killing and dismemberment of a Chinese student, police in Canada have revealed.
However, authorities would not give details because of fears of copycat crimes.
The case spread to the other end of the country as police said yet more body parts in packages mailed to two Vancouver schools, discovered Tuesday, are thought to be linked to the case. One contained what appeared to be a right hand. The other contained what looked like a right foot. Police said they were mailed from Montreal, where the killing and dismemberment occurred.
The suspect in the death of Jun Lin, 29-year-old Luka Rocco Magnotta, was arrested in Berlin on Monday night (NZ time) and could be extradited to Canada by the end of the week.
The case has unfolded quickly since body parts were mailed last week to the headquarters of Canada's Liberal and Conservative parties. A torso was found in a suitcase outside Magnotta's apartment building.
The head is still missing.
Montreal Police Cmdr. Ian Lafreniere said notes were included in the packages addressed to the political parties. He said at least one of the Vancouver packages also contained a note. He declined to say whom they were addressed to or what they said. The suspect faces a charge of threatening Canadian Prime Minister Stephen Harper for sending the package to his party's office.
Lafreniere said police don't know why the hand and foot were mailed to the Vancouver schools, though he confirmed that Magnotta either lived in the city or passed through there at one point.
"They were the same limbs we were looking for," Lafreniere said. DNA tests will be conducted to determine if there is a match, he said.
Investigators say Magnotta videotaped the killing and dismemberment in his apartment and posted it online. The video also shows the suspect eating parts of the body, police said. A copy of the video viewed by The Associated Press did not show anyone eating the body but did show a man using a fork and knife on it. Police suggested they have access to more extensive video of the killing, possibly an unedited version.
Magnotta was caught at an Internet cafe in Berlin after evading police for days while he partied in Paris. He has told German authorities he would not fight extradition.
German authorities are waiting on Canada's formal extradition request, Martin Steltner, a spokesman for Berlin prosecutors, said early today (NZ time). The Canadian Embassy in Berlin declined to comment on when Ottawa may file the official papers seeking extradition.
Magnotta arrived in Berlin on Saturday on a bus from Paris and stayed with a friend, or someone he met on the Internet, for two nights before he was captured, Steltner said. Investigators in Germany were looking for more information on the person.
Lafreniere said they saw video Wednesday that the suspect might have made while on the run.
Lin's parents, meanwhile, arrived in Montreal from China late Tuesday and were expected to meet with investigators on Wednesday, said Zheng Xu, a press spokesman at the Chinese consulate.
Commander Denis Mainville, the head investigator of the Montreal police major crimes unit, said investigators will review hundreds of homicide cases over the last 30 years throughout Quebec for any possible links to Magnotta. Mainville said such a review is routine in such cases.
Meanwhile, DNA tests have confirmed that the body parts mailed to the two political parties were Lin's remains, police said, and they have footage of Magnotta mailing the two parcels that were sent to Ottawa.
Police concerns about copycats grew Wednesday after a fake foot, made of rubber, was found in a Montreal street Wednesday morning. Lafreniere said it looked very realistic and probably had been used in movie production.