Six people were killed and eight wounded when gunmen opened fire at a Quebec City mosque during Sunday , in what Canadian Prime Minister Justin Trudeau called a "terrorist attack on Muslims". Police said two suspects had been arrested, but gave no details about them or what prompted the attack. Initially, the mosque president said five people were killed and a witness said up to three gunmen had fired on about 40 people inside the Quebec City Islamic Cultural Centre. Police said only two people were involved in the attack. The mosque's president, Mohamed Yangui, who was not inside when the shooting occurred, said he got frantic calls from people at evening prayers. Prime Minister Justin Trudeau said in a statement: "We condemn this terrorist attack on Muslims in a center of worship and refuge".