MONTREAL - Montreal police are investigating whether remains found in a city park are linked to alleged killer Luka Rocco Magnotta.

A police source tells the Associated Press the remains appear to be a human head.

Magnotta is accused of the murder and dismemberment of Concordia University student Jun Lin. He has pleaded not guilty and has opted for a trial in front of a jury.

Lin's torso was discovered stuffed in a suitcase behind Magnotta's apartment building in late May. His hands and feet were mailed to political parties in Ottawa and two B.C. schools.

His head has still not been found.

Montreal Police spokeswoman Anie Lemieux says tests will be run on the remains to determine if they are in fact body parts and whether they're related to the Magnotta case.

"For the time being it is still too early to confirm anything," Lemieux said.

Montreal's Major Crime Squad cordoned off parts of the Angrignon Park in the city's west end after the discovery was made following a tip on Sunday.

Magnotta, 29, is accused of the first-degree murder of Lin, along with defiling his corpse. He is also charged with harassing Prime Minister Stephen Harper and MPs, and publishing and mailing obscene material.

He was arrested in Germany after an international manhunt ended with his capture at a Berlin Internet cafe.

The amateur porn actor will face a preliminary hearing next March where part of the evidence against him will be heard.

Thirty-three-year-old Lin, who was originally from China, was studying computer science in Montreal.

His family travelled to Canada to receive his remains and have been following Magnotta's legal proceedings.

— with files from the Associated Press

Earlier on HuffPost:

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  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Photos from the family of Jun Lin, the victim of Luka Magnotta were given to media Tuesday, April 2, 2013 in Montreal. Preliminary hearing is underway for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Luka Rocco Magnotta is shown in an artist's sketch in a Montreal court on Wednesday, March 13, 2013. Magnotta has collapsed in court during his preliminary hearing.The notorious suspect in a killing and dismemberment case had been listening to evidence against him, whose contents are subject to a publication ban.

  • Daran Lin, father of murder victim Jun Lin, leaves the courthouse in Montreal on Tuesday, March 12, 2013. Preliminary hearing is set to start for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Luka Rocco Magnotta is seen in an artist's sketch in a Montreal court on Monday, March 11, 2013. A preliminary hearing is set to start for Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.Magnotta's lawyers want the public and media barred from attending the hearing, which is to determine if there is enough evidence for a trial.

  • Daran Lin, father of murder victim Jun Lin, leaves court with his translator Daran Lin in Montreal on Tuesday, March 12, 2013. Preliminary hearing is set to start for Luka Rocco Magnotta, the man charged in connection with the infamous body-parts case that made international headlines.

  • Alleged killer Luka Rocco Magnotta is seen in court on a artist drawing Wednesday, January 9, 2013 in Montreal. Magnotta is charged with first-degree murder in the slaying and dismemberment of Chinese engineering student Jun Lin.

  • Luka Rocco Magnotta is taken by police from a Canadian military plane to a waiting van on Monday, June 18, 2012 in Mirabel, Quebec. Magnotta, the lone suspect in a brutal Montreal killing that made headlines around the world, is back home to face justice on Canadian soil. (Montreal Police)

  • Magnotta lands in Canada (Montreal Police)

  • Magnotta lands in Canada (Montreal Police)

  • Mug shot of Luka Rocco Magnotta, released by Montreal Police on Tuesday, June 5, 2012. Magnotta told a judge Tuesday he will not fight his extradition from Germany to Canada, Berlin police say. Magnotta is wanted in Canada on several charges, including first-degree murder, in connection with the killing and dismemberment of Chinese national Jun Lin. (AP Photo/Montreal Police Service via The Canadian Press)

  • Vancouver Police Deputy Chief Warren Lemcke speaks during a news conference after a human hand was delivered to a school and a human foot to another in Vancouver, B.C., on Tuesday June 5, 2012. Montreal police later confirmed the packages are connected to the dismembered body of a Chinese student found in Montreal last week and the international manhunt for his killer. (THE CANADIAN PRESS/Darryl Dyck)

  • A man walks his dog past St. George's School where a human foot was delivered to the school earlier in the day in Vancouver, B.C., on Tuesday June 5, 2012. A human hand was also delivered to another Vancouver school Tuesday. (THE CANADIAN PRESS/Darryl Dyck)

  • A television cameraman films parents and students at False Creek Elementary School after a human hand was delivered to the school earlier in the day in Vancouver, B.C., on Tuesday June 5, 2012. A human foot was also delivered to another Vancouver school Tuesday. (THE CANADIAN PRESS/Darryl Dyck)

  • A police car leaves the central police detention facility of Berlin supposedly carrying Luka Rocco Magnotta to a Berlin court Tuesday, June 5, 2012. Luka Magnotta, 29, a Canadian porn actor suspected of murdering and dismembering a Chinese was arrested on Monday at an Internet cafe. A cafe employee recognized Magnotta from a newspaper photo and flagged down a police car. (AP Photo/dapd/ Timur Emek)

  • The internet cafe where Luka Rocco Magnottahe was recognized in the district of Neukoelln in Berlin, Germany, Monday, June 4, 2012. (AP Photo/Markus Schreiber)

  • This image taken from CCTV obtained by Associated Press video shows Luka Rocco Magnotta entering the Internet cafe in the district of Neukoelln in Berlin, Germany, Monday, June 4, 2012, where Kadir Anlayisli, who works in the cafe recognized him. "I looked at him and thought I knew him from somewhere, because I read newspapers every day," Anlayisli said. (AP Photo/AP Video)

  • This image taken from CCTV obtained by Associated Press video shows Kadir Anlayisli, a cafe worker waiting for police in the doorway of the Internet cafe in the district of Neukoelln in Berlin, Germany, Monday, June 4, 2012, where Luka Rocco Magnotta was arrested. (AP Photo/AP Video)

  • This image taken from CCTV obtained by Associated Press video shows police entering the Internet cafe shortly after. (AP Photo/AP Video)

  • This image taken from CCTV obtained by Associated Press video shows Luka Rocco Magnotta, 2nd left, being removed by police from the Internet cafe. (AP Photo/AP Video)

  • Kadir Anlayisli stands next to the computer where he recognized Luka Rocco Magnotta. (AP Photo/Markus Schreiber)

  • The Interpol alert, which shows various photos and a discription of Luka Rocco Magnotta. (AP Photo/Interpol/dapd)

  • This surveillance image provided by Interpol shows Luka Rocco Magnotta at a security checkpoint. (AP Photo/Interpol)

  • In a Wednesday, May 30, 2012 photo, janitor Eric Schoer looks at a blood-stained fridge at an apartment rented by suspect Luka Rocco Magnotta, where police believe a man was murdered and dismembered, in Montreal. (The Canadian Press, Ryan Remiorz)

  • A police officer removes a package containg a human foot from the Conservative Party headquarters in Ottawa on Tuesday, May 29, 2012. (THE CANADIAN PRESS/Sean Kilpatrick)

  • The following is a series of photos and self-portraits posted by Magnota on various websites (Facebook)

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  • (http://luka-magnotta.com)

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  • (http://luka-magnotta.com)

  • (http://luka-magnotta.com)