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President Donald Trump called the suspect in the Las Vegas massacre a "sick" and "demented" man.

Speaking outside the White House before traveling to Puerto Rico to survey the Hurricane Maria recovery efforts, Trump addressed the horrific shooting that left at least 59 people dead and more than 500 injured.

He said investigators are looking into gunman Stephen Paddock and what his motivations might have been.

"We're dealing with a very, very sick individual," he said.

On Sunday night, Paddock opened fire on an outdoor music festival from his hotel room on the 32nd floor of the Mandalay Bay Resort and Casino.

Trump praised the first responders who tended to victims and the officers who rushed to Paddock's hotel room. Paddock committed suicide before the door was breached.

"What happened in Las Vegas was in many ways a miracle," Trump said. "The police department has done such an incredible job."

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