The 27-year-old suspect in a terrorist attack against Muslims at Quebec City during evening prayers was charged on Monday with six counts of first degree murder and five counts of attempted murder.
The massacre on Sunday evening, which Canadian prime minister Justin Trudeau condemned as a “cowardly terrorist attack on Muslims”, left five others in critical condition.
A further 12 worshipers managed to escape the chaos with minor injuries.
Police initially arrested two men but later said just one, Alexandre Bissonnette, remained a suspect.
A second person held in connection with the shooting was later described as a witness. One man was arrested at the scene and a second man held after he called 911, police said.
A handgun and at least two assault rifles were also recovered, according to Canadian media reports.
Bissonnette is a French-Canadian student, according to local news website TVA, which cited police sources. A Facebook page reportedly belonging to Bissonnette included “likes” for Donald Trump and Marine Le Pen, the far-right French presidential candidate.
The suspect has made a brief court appearance at which he did not enter a plea. He stared at his feet and fidgeted during the hearing as he appeared in a white prisoner jumpsuit. His next court date is February 21.