Quebec (Canada) - Several people were shot and killed in a Quebec mosque on Sunday night, police said. Gunmen opened fire during evening prayer in an Islamic cultural centre in the capital city of Canada's French-speaking province. Quebec's police said two suspects were arrested and reported "several" victims, including deaths. The mosque's president told Reuters that five people were killed. "Tonight, Canadians grieve for those killed in a cowardly attack on a mosque in Quebec City," said Justin Trudeau, prime minister. Philippe Couillard, Quebec's premier, called the act "barbaric violence". The attack comes as Quebec has seen an influx of Muslim immigrants in recent years, fuelling tension and sparking a fierce debate over whether Muslim women should be allowed to wear a niqab — a face-covering veil — in citizenship ceremonies.