2017 mass shooting originating from Mandalay Bay hotel room

On October 1, 2017, a gunman opened fire from a suite on the 32nd floor of the Mandalay Bay Resort and Casino into attendees of the Route 91 Harvest country music festival across the Las Vegas Strip. The attack resulted in dozens of deaths and hundreds of injuries and is recorded as the deadliest mass shooting in modern U.S. history. The shooter died by suicide in his hotel suite; subsequent investigations and reports documented the location and method used in the attack. The event prompted changes to mass-gathering security and hotel room-safety procedures in Las Vegas and elsewhere.