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President Donald Trump addressed Sunday night's shooting massacre in Las Vegas, calling it an "act of pure evil."

A gunman sprayed bullets at concertgoers at the Route 91 Harvest Festival from the 32nd floor of a nearby hotel, killing more than 58 and injuring more than 515.

"To the families of the victims, we are praying for you and we are here for you," President Trump said.

"Scripture teaches us the Lord is close to the broken-hearted and saves those who are crushed in spirit. We seek comfort in those words for we know that God lives in the hearts of those who grieve," he said.

The flag will be flown at half staff in honor of the fallen and wounded, the president directed.

"Though we feel such great anger at the senseless murder of our fellow citizens, it is our love that defines us today and always will forever."

"In times such as these, I know we are searching for some kind of meaning in the chaos, some kind of light in the darkness," the president said. "The answers do not come easy."

He also thanked first responders and law enforcement for their swift action protecting people.

"The speed with which they acted is miraculous," Trump said.

The FBI and the Department of Homeland Security are working with local officials on the investigation, the president reported.

Trump will visit Las Vegas on Wednesday to meet with law enforcement and the families of the victims.

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