People flee outside the Mandalay Bay Hotel after a gunman opened fire on attendees of the Route 91 Harvest Music Festival in Las Vegas People flee outside the Mandalay Bay Hotel after a gunman opened fire on attendees of the Route 91 Harvest Music Festival in Las Vegas, U.S., October 1, 2017 in this still image obtained from social media video. TWITTER @EIRIKURH via REUTERS