Security has been stepped up at mosques in New York City and elsewhere after a deadly assault on an Islamic center in Canada over the weekend.
Six worshipers were killed Sunday when two gunmen opened fire in the Islamic Cultural Center of Quebec, authorities said.
As Prime Minister Justin Trudeau called the assault a "terrorist attack on Muslims," New York Mayor Bill de Blasio said police there were providing additional protection for mosques in the city, which upwards of one million Muslims call home.
"All New Yorkers should be vigilant," the mayor tweeted. "If you see something, say something."
In the Canada attack, Quebec provincial police spokeswoman Christine Coulombe told reporters that eight additional people were wounded, some gravely.
"Six people are confirmed dead — they range in age from 35 to about 70," Coulombe said.
In a statement released Monday, Trudeau doubled down on earlier support he gave his country's Muslims, as well as those affected by Donald Trump's travel ban, over the weekend.
"It is heart-wrenching to see such senseless violence," he said in a statement early Monday. "Diversity is our strength, and religious tolerance is a value that we, as Canadians, hold dear."
Police said two suspects were arrested, but gave no details about them or what prompted the attack.
Officials said about 50 people were in the mosque when the gunmen opened fire on the men's side of the center.
Last June, a pig’s head was left at the door of the same mosque in the middle of Ramadan.