Montreal, Canada (CNN) - Canadian police are asking for help finding 29-year-old Luka Rocco Magnotta.

He's now a suspect in a gruesome case involving a man's torso found in Montreal Tuesday.

Officials believe he knew the victim.

He also goes by the name Eric Clinton Newman.

They say they got his photo from a "very graphic website."

Authorities believe the case may be linked to one where a human hand and foot were mailed from Montreal to Ottawa.

A warrant has been issued for Magnotta's arrest.

CNN