President Trump speaking out on Sunday night's shooting at the "Route 91 Harvest Music Festival" at the Mandalay Bay Casino in Las Vegas, Nevada.

FOX's Jon Decker reports from the White House:

Calling the mass shooting attack in Las Vegas "an act of pure evil," President Trump said the country today is joined together in sadness, shock and grief:

(President Trump) "In moments of tragedy and horror, America comes together as one. And it always has."

The President praised first responders and announced he is traveling to Las Vegas Wednesday to meet with families of the victims and law enforcement. He also ordered all federal buildings to fly their flags at half-staff until sunset on Friday.

At the White House, Jon Decker, FOX News.