Via Reuters:

Five people were killed after gunmen opened fire in a Quebec City mosque during evening prayers, the mosque’s president told reporters on Sunday.

Earlier, a witness told Reuters that up to three gunmen fired on about 40 people inside the Quebec City Islamic Cultural Center.

Update:

Police says multiple victims, two in custody.

Local press in French is saying four dead, some wounded…

Update:

Attackers shouted “Allahu Akbar!” Police have classified it as terrorism, but have not as yet named the shooters.