Good Morning AmericaLas Vegas strip shooting: More than 20 dead, 100 injured after gunman opens fire near Mandalay Bay casino

 KARMA ALLEN and EMILY SHAPIRO,Good Morning America 5 minutes ago

 Scroll back up to restore default view.More than 20 people were killed and 100 injured in a horrific shooting near the Mandalay Bay Resort and Casino in Las Vegas Sunday night, police said.The „nonstop gunfire,” according to one witness, sent bystanders outside the resort on the Vegas strip ducking for cover and fleeing for their lives. Tourists hid in their hotel rooms and flights headed into the McCarran International Airport airport were held elsewhere.Bystanders sprang into action, caring for the wounded and at least one described someone dying in their arms.Videos filmed by onlookers gave a window into the chaos that ensued, with some thinking that fireworks were going off. The final night of the Route 91 Harvest Music Festival was taking place across the street from Mandalay Bay when the shooting took place and concertgoers were caught off-guard.In the wake of the shooting, the Las Vegas Police Department said that „one suspect is down” and they did not believe there were any more shooters.