2017 Las Vegas mass shooting from Mandalay Bay

On October 1, 2017, a gunman fired from a 32nd-floor suite of the Mandalay Bay Resort and Casino into the crowd at the Route 91 Harvest music festival on the Las Vegas Strip, killing 60 people and injuring hundreds. The shooter died by suicide in his suite and law enforcement recovered multiple firearms and thousands of rounds. The attack prompted federal and local investigations and led to changes in security practices for large outdoor events in Las Vegas.