On Monday, a shooter identified as Seth Hatfield carried out a deadly attack in Montreal that left three people dead, including a police officer; authorities say the gunman traveled from Alberta and was killed by police after beginning his rampage inside a grocery store in a predominantly Jewish neighborhood.
Police and media reports indicate investigators found a 104-page manifesto tied to Hatfield that contains violent, misogynistic language and calls for widespread killing. That document reportedly criticizes feminism, capitalism, liberalism, and pornography while urging an armed uprising, and it has drawn attention for its apparent alignment with the so-called incel subculture. Authorities are analyzing the text as part of an ongoing criminal investigation and are working to clarify motives and any connections to broader movements.
A suspect armed with a long gun opened fire on Monday at a Montreal hotel, killing a police officer before officers returned fire, killing him, police said. A civilian also died but it wasn’t immediately clear who fired that shot.
The police chief, Fady Dagher, said a second officer was seriously injured in the shooting in the city’s Côte-des-Neiges neighbourhood but is in stable condition.
Early reports describe a chaotic scene across multiple locations, beginning in a grocery store and moving to a hotel where confrontations with police occurred. Local officials confirmed one officer was killed and another seriously wounded, with the injured officer later listed in stable condition. Witnesses and emergency responders are still piecing together the timeline as investigators interview bystanders and review surveillance footage.
“Be steadfast, move forward, and KILL THEM ALL!” wrote Seth Hatfield in conclusion to his 104-page document. The text was being thoroughly analyzed by police on Monday, in the hours following the tragedy that left three dead.
It is unclear who the young man is proposing to kill. According to our sources, Hatfield has been driving from Alberta in recent days. Investigators believe he espouses an ideology similar to that of involuntary celibates, or “incels.”
In his lengthy text, which our investigative team was able to consult, he deplores “the state of affairs regarding young people (approximately under 30 years old) who live in highly developed Western countries.”
He denounces the fate of a majority of men, whom he calls “ordinary men.” He contrasts them with a small number of “brutes,” those who are supposedly preferred by women because of their attractive physique.
Canadian broadcasters reporting on the case say the manifesto distributes violent rhetoric aimed at women and frames grievances in masculinist terms. Media outlets and police have described links to the incel subculture, a loosely defined online movement associated with resentment and occasional acts of targeted violence. Officials stress that while the manifesto exists, the full contents have not been publicly released to avoid spreading extremist material or interfering with the investigation.
Investigators are treating the attack as an act of violence potentially motivated by extremist beliefs and personal grievance, and they are coordinating across provincial lines to reconstruct Hatfield’s movements prior to the killings. Law enforcement agencies are also examining any online activity, communications, and contacts that may reveal planning or assistance. As evidence is catalogued, courts and prosecutors will determine charges and any public disclosures consistent with legal and safety considerations.
Canada has had relatively few mass shootings compared with some countries, but high-profile rampages over the past years underscore vulnerabilities and the deadly consequences when individuals commit targeted violence. Past incidents cited by commentators include a 2020 Nova Scotia rampage and a 2026 case in British Columbia; officials say each event spurs renewed discussion about prevention, policing, and how to disrupt radicalization pathways. Those debates often involve law enforcement, mental health professionals, community leaders, and policymakers.
Public safety officials have urged residents in affected neighborhoods to follow police guidance and to report any information that could aid investigators. Emergency services and city resources remain engaged in supporting victims’ families and the wounded, while memorials and community responses are expected in the coming days. Authorities say updates will be released as forensic work, witness interviews, and other investigative steps are completed.
At the moment, the investigation remains active and details continue to emerge about the shooter’s background, the content of the manifesto, and any potential contacts or triggers that led to the attack. Police are balancing transparency with the need to protect the integrity of their inquiries and the privacy of victims. For now, law enforcement continues to collect evidence, interview witnesses, and coordinate with partners as they seek a full account of what happened and why.
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