Police have released chilling 911 calls and surveillance video from the Mandalay Bay hotel showing the terror and chaos that unfolded during the Oct. 2017 massacre. 

The attack by 64-year-old Stephen Paddock left 58 dead and 851 wounded as he rained gunfire on country music concert-goers from the 32nd floor of the hotel-casino.

The new surveillance videos show the crowd from the top of the hotel during what turned out to be the deadliest mass shooting in modern U.S. history.

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In one 911 call, a young woman screams that her friend had just been shot. In another, a woman told the 911 operator she was hiding in a parked car after fleeing the scene to a nearby airport hangar.

"It's chaos around me," another woman told a 911 dispatcher.

Survivors and families of those who were killed are still seeking answers on the motive for Paddock's attack. No links to domestic or international terrorists have ever been found, according to authorities. 

Paddock was known to hotel staff as a wealthy gambler and he was seen on numerous security videos coming and going from the hotel in the days before the massacre, secretly bringing in his large arsenal of semi-automatic weapons. 

Police said Paddock used bump stocks to modify the firearms so they would fire at the rate of an automatic weapon.

Watch the report from Jonathan Hunt above.

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