CNN - More than 50 people were killed and more than 200 injured in a shooting on the Las Vegas Strip early Monday morning, police said.
Related: Photos from the scene
LVMPD Sheriff Joseph Lombardo told reporters that police responded after reports of shots being fired from the Mandalay Bay towards the Route 91 Harvest concert.
NBC News reported that the suspect has been identified as 64-year-old Stephen Paddock, a white male from the Vegas area.
"We determined there was a shooter on the 32nd floor of the Mandalay Bay," Lombardo said. Officers engaged the suspect, whom Lombardo described as a "local resident." He said that Lombardo is dead and that police believe that there are no other shooters.
Two Las Vegas police officers are being treated at a local hospital for injuries they sustained during the shooting, Lombardo said. One is in critical condition and the other sustained minor injuries.
In addition, the sheriff stated that there were off duty officers attending the concert who may have died. The identities of the officers involved have not been released.
"Pray for Las Vegas," the city's mayor tweeted. "Thank you to all our first responders out there now."
The White House reported President Donald Trump has been briefed on "the horrific tragedy."
My warmest condolences and sympathies to the victims and families of the terrible Las Vegas shooting. God bless you!
— Donald J. Trump (@realDonaldTrump) October 2, 2017
Concertgoers describe shooting
CNN spoke to three people who were attending the concert at the Las Vegas Village outdoor arena when gunfire broke out, causing them to flee. They described hearing the sound of gunfire while Jason Aldean was performing.
"We were close to the stages -- about six rows from the front on the left hand side and he was just performing," Rachel Dekerf said.
"People went down on the Mandalay side of the stage," Joe Pitzel said. "I don't know if people were ducking or if people were hit."
Derkef filmed her escape from the venue using her cell phone, starting just after the first shots were fired.
She described ongoing gunfire, and played out the video she had recorded during which more than five minutes of gunfire were intermittently audible.
"The gunshots lasted for 10-15 minutes. It didn't stop," she said. "We just ran for our lives."
'Go, go, go, go'
Derkef's sister, Monique Dumas, said that everyone instantly crouched when they heard the shots.
"The band was rushed off the stage, the floodlights came on the crowd, and you see on the right hand of the stage the person who was injured, so they're calling for medics, calling for security, then there was gunfire again," Dumas said.
"It seemed there was a pause in the gunfire and the people in the yellow shirts were telling the people to 'go, go, go, go' ... the gunfire never ended, it seemed like it went on and on and on," she said.
'Sounded like firecrackers'
Eyewitness Bryan Heifner spoke to CNN from a room in a hotel across from the Mandalay Bay, which he said he could see from his window.
"Mostly I heard the shots, just so many shots -- I just thought it was a semi braking with the air brakes, but then I went downstairs and saw people running and looking for family," he said.
"I immediately went back to my room, locked the door, turned the lights off."
Facebook has set up a crisis response page to help people establish whether their loved ones are safe.
Developing story - more to come