Police have identified Stephen Paddock as the gunman who opened fire on concertgoers from a hotel room in Las Vegas, killing at least 59 people and leaving more than 500 wounded in the deadliest mass shooting in U.S. history.

A gunman perched high on the 32nd floor of a Las Vegas Strip casino unleashed a shower of bullets down on an outdoor country music festival below, killing at least 58 people and wounding more than 515 as thousands of frantic concert-goers screamed and ran for their lives, Clark County Sheriff Joseph Lombardo said Monday. It was the deadliest mass shooting in modern U.S. history.