Las Vegas was the site of what is now being called the deadliest mass shooting in American history last night, as 64-year-old Stephen Paddock, a local resident with no known affiliations to terrorism, opened fire on a gathering of thousands of people attending a country music festival on the Strip.

More than 50 people were killed, and more than four hundred more were injured before police were able to find the man’s elevated firing position on the 32nd floor of the nearby Mandalay Bay hotel.  It’s currently unclear whether officers shot and killed Paddock, or if he took his own life. In his room they found at least eight additional firearms, including a number of long guns.

“We have no idea what his belief system was,” Clark County Sheriff Joseph Lombardo said. “We’ve located numerous firearms within the room that he occupied.”

ISIS has claimed responsibility for the attack, insisting that Paddock was a recent convert to Islam. There are no indications of that being true.