Police in Las Vegas, Nevada say a man opened fire on a country music concert late Sunday, killing at least 50 people and wounding more than 400 others, in the deadliest mass shooting in U.S. history.
Las Vegas Shooting

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The grounds are shown at the Route 91 Harvest festival, with the Mandalay Bay Hotel behind the stage, on Las Vegas Boulevard South in Las Vegas, Nevada, Oct. 1, 2017.

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People scramble for shelter at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada.

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People run from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada.

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People tend to the wounded outside the Route 91 Harvest Country music festival grounds after an apparent shooting on Oct. 1, 2017 in Las Vegas, Nevada.

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A man lays on top of a woman as others flee the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada.

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Police officers advise people to take cover near the scene of a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas.

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A body is covered with a sheet in the intersection of Tropicana Avenue and Las Vegas Boulevard South after a mass shooting at a music festival on the Las Vegas Strip in Las Vegas, Nevada, Oct. 1, 2017.

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A pair of cowboy boots is shown in the street outside the concert venue after a mass shooting at a music festival on the Las Vegas Strip in Las Vegas, Nevada, U.S.