LAS VEGAS _ At least two people are dead and 24 others are hospitalized in the wake of a mass shooting Sunday night at the Mandalay Bay hotel and resort on the Las Vegas Strip, a hospital spokeswoman confirmed.
University Medical Center spokeswoman Danita Cohen said the hospital is still evaluating the condition of "many patients" with gunshot wounds in the wake of the shooting.
Police were establishing a command post and triage center, and have shut down parts of the Strip.
"We're investigating reports of an active shooter near/around Mandalay Bay Casino. Asking everyone to please avoid the area," the Las Vegas Metropolitan Police said on Twitter.
Concertgoers at a Route 91 Harvest country music festival performance reported a burst of weapons fire as the concert was underway. The shots appeared to be coming from an upper floor of the hotel, some witnesses said.
Video posted on social media showed a country artist mid-song at the open-air venue when bursts of automatic gunfire rang out in rapid succession. The shooting went on for about 10 seconds before the music stopped. The crowd appeared slow to move at first, then concertgoers began running and screaming.
"Get down, stay down," a woman shouted moments later. "Let's go," another voice said. Another wave of gunshots followed soon after.
Officials at McCarran International Airport reported that some flights have been diverted in the wake of the shootings. "Expect delays," the airport said on Twitter.
Hospital personnel across Las Vegas have been paged to work, local media reported.
Parts of I-15 near the Strip were also shut down, and hotel guests across the strip were being ordered to shelter in place.