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President Donald Trump on Monday called a shooting massacre in Las Vegas "an act of pure evil."

The Sunday night shooting, the deadliest in United States history, left 58 people dead and more than 500 injured.

A gunman opened fire from the 32nd floor of the Mandalay Bay Resort and Casino on an outdoor country music festival, sending the crowd of more than 22,000 running and ducking for cover. The gunman, 64-year-old Stephen Paddock, is dead.

Trump said he will visit Las Vegas on Wednesday.

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Trump: Las Vegas shooting 'was an act of pure evil'

At least 50 dead, 400+ sent to hospitals in Las Vegas; shooting becomes deadliest in US history