Motive Unknown in Canada Mosque Shooting

The attack came during evening prayers last night at the Quebec City Islamic Cultural center.
2:43 | 01/30/17

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Transcript for Motive Unknown in Canada Mosque Shooting
a moment. First the breaking news overnight a deadly terror attack at a mosque in Quebec, Canada. At least two gunmen opening fire. Now in custody. ABC's chief investigative correspondent Brian Ross is here with the latest on all of that. Good morning, Brian. Well, good morning, Amy. Authorities this morning say they do not yet know the motive of the terror attack on the mosque. But it came just after the Canadian prime minister said Canada would welcome all those fleeing persecution regardless of their faith. The attack came during evening prayers last night at the Quebec city islamic cultural centre. Witnesses described at least two or three gunmen dressed in black who stormed the crowded holy place. We saw three men walk in. They shouted allahu akbar and they opened fire. Reporter: Emergency response crews found a scene of carnage. Madame. Reporter: Police say at least six were killed and eight wound sfwld two people standing next to me praying were killed. There were a lot of shots going on. I couldn't count. Reporter: One survivor told ABC news the gunmen sounded as if they had come from Quebec based on their local accents. Police are still looking over piles of surveillance footage. This is a mosque with a security system that was put in place so they have that footage to go over. Reporter: Overnight authorities announced two men in their 20s had been arrested as suspects in the shooting. One was arrested here and the other one was arrested. Reporter: It came one day after Canadian prime minister Justin Trudeau reacted to the immigration ban announced by president trump. He wrote, to those fleeing persecution, terror and war, Canadians will welcome you regardless of your faith. Diversity is our strength. Canada has admitted close to 40,000 refugees since Trudeau took office in late 2015. Many of them from war-torn Syria. This morning Canadian officials say they stand behind the country's Muslim population. We should not withdraw and become a close society because of such a terrible event. On the contrary we have to keep working together for an open, inclusive peaceful society. That's the right response. Reporter: No word so far this morning on what police are learning from the two men they've taken into custody. But this is not the first time that mosque has been the target of hate. Over the summer the mosque president said someone left a bloodied pig's head at the front door of the mosque. We all know there is so much unrest here in this country. So how is security changing for mosques around the united States. In New York especially stepped up patrols at mosques and other cities, as well and overnight the mayor of New York said the muslims in New York City, we'll protect you. The NYPD will protect you, Amy. All right, Brian, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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