Six people were killed and eight were injured after a shooting at a mosque in Quebec, according to Quebec Provincial Police.
The attack, which took place at the city's Quebec Islamic Cultural Center, is being investigated as an act of terrorism by police.
In what was described as a coordinated attack, witnesses say at least two gunmen wearing black fired indiscriminately into the dozens of worshipers in the mosque.
Thirty-nine people who were at the mosque during shooting were unharmed, the spokeswoman of National Police of Quebec, Christine Coulombe, said.
One person has been arrested, the department said. A previous statement indicated that two arrests had been made. It's not clear what caused the discrepancy.
The Canadian province's premier, Philippe Couillard, called the shooting a terrorist act on Twitter. He added that he would ask the National Assembly to fly the Quebec flag at half-staff.
Police said in a later tweet that the situation was under control. "The site is secure and the occupants (of the mosque) were evacuated. The investigation continues." Police are not ruling out the existence of accomplices.
"Tonight, Canadians grieve for those killed in a cowardly attack on a mosque in Quebec City. My thoughts are with victims & their families," the Canadian Prime Minister Justin Trudeau posted on his Twitter account.
A statement on the mosque's Facebook page urged caution. "Please wait for preliminary results (of the investigation) before circulating rumors," it says. "The situation is very critical. May Allah give us endurance."
At least five of those injured in the incident were receiving treatment at the University Hospital of Quebec. Other victims are in hospitals throughout the city, hospital spokesman Richard Fournier told CNN.
Last June, the cultural center received a wrapped pig head and a magazine with a pig on its cover, saying "Bonne Appetit".
