What we know about Stephen Paddock, the man behind the worst mass shooting in US history

Las Vegas Police have identified Stephen Paddock as the man who opened fire from the 32nd floor of the Mandalay Bay hotel with an automatic rifle, killing more than 50 and injuring at least 200 in the worst mass shooting in US history.

The 64-year-old targeted concertgoers at the Route 91 Harvest country music festival at around 10 p.m. local time (PDT) on Sunday night.

Video and pictures from the scene captured the chaos and human toll taken as extended bursts of automatic rifle fire rang out.

Police are not investigating the attack as an act of terrorism at this time.

Following the attack, Las Vegas police found and killed Paddock. They discovered multiple rifles in his hotel room, according to Joseph Lombardo, sheriff of the Las Vegas Metropolitan Police Department.

Police were hunting for and found 62-year-old Marilou Danley, who they've identified as Paddock's roommate.

Families looking to locate missing loved ones, should call 1-866-535-5654.