Police arrested a 23-year-old man under a little used section of the criminal code relating to terrorism.
The RCMP issued a news release saying Kevin Omar Mohamed was arrested in Toronto under a Criminal Code provision titled Fear of Terrorism.
The provision was tweaked last year as part of the former Conservative government's controversial Bill C-51, which allowed police to arrest someone -- with consent of the attorney general -- on grounds they may commit a terrorist offence.
Previously, police had to believe someone actually would carry out the crime.
A charge is not laid under the rarely used provision.
But police have laid charges against Mohamed of carrying a concealed weapon and possession of a weapon dangerous to public peace.
Police say there is no evidence of any plans of a domestic terrorism attack and the RCMP specified that the suspect's arrest is not linked to recent terrorist attacks in Brussels.
Mohamed is in custody and is due in court again on Tuesday.