The suspect accused of fatally shooting a police officer outside a Montreal hotel had a manifesto linking him to the online incel movement, a misogynistic extremist community centered on grievances over sexual relationships, an official familiar with the investigation said on Tuesday.

The suspect, armed with a long gun, opened fire Monday before officers returned fire, killing him, police said. A civilian also died, but it wasn’t immediately clear who fired that shot.

The official, speaking on condition of anonymity as they were not authorized to speak publicly about the case, said the manifesto links the suspect to the "involuntary celibate” or "incel” ideology, a mostly online group of people, primarily men, who believe society unjustly denies them sexual or romantic attention.

Police have not publicly identified the suspect.

Police identified the officer killed as Constable Mohamed Lamine Benredouan, 34. He had been with the force since 2021.