A terrorist stationed on the 32nd floor of a Las Vegas strip casino opened fire on an outdoor music festival, killing at least 58 people as tens of thousands of people fled in terror, officials said Monday. It is the worst shot-to-kill on American soil in the country's modern history.
Police said more than 500 people were injured.
SWAT agents used explosives to enter the attacker's hotel room and found that he had committed suicide, authorities said. Beside his body were large numbers of firearms.
The reason for the attack is unknown. The Department of Homeland Security said "there is no specific credible threat" against other localities.
Country star Jason Aldean was on the stage of the Route 91 Harvest Festival on Sunday night when the shooting began.
The assailant was on the 32nd floor of the Mandalay Bay Hotel and Casino, across the street from the concert, said Clark County Police Chief Joseph Lombardo. He was identified as Stephen Paddock, 64.
In addition to Paddock, police located the woman who apparently shared the room with him, identified as Marilou Danley.
The authorities believe that it was a single attacker, who acted on his own.
Concert attendees said they heard shots of an automatic weapon during the incident.
Two deceased out-of-service agents were attending the concert as a public, Lombardo said. Another off-duty officer was in critical condition and one more was injured, he added. Several members of the California security forces were present at the festival. A Bakersfield police officer was taken to a hospital with life-threatening injuries.
Hours after the shooting, Aldean reported on Instagram that he and his team were well and said the shooting was "more than horrible."
Kodiak Yazzie, 36, said he was watching Jason Aldean's performance with his girlfriend when he heard a sound similar to the fireworks. The music paused momentarily and started again before a new round of sounds made the singers cover themselves and flee the stage.
Thousands of people escaped the bursts of gunfire, which could be heard for more than five minutes, Yazzie said.
Monique Dumas, of British Columbia in Canada, said she was six rows from the stage when the shots began.
At first, he said, he thought that some bottle had broken, and then thought it was fireworks. He said that when he left, it seemed "an organized chaos ... it took like four or five minutes and all that time there were shots."
Jose Baggett, a 31-year-old resident of Las Vegas, said he was at the entrance to the Luxor hotel-casino _ just north of the festival _ with a friend when people started running. He saw people crying, and when they left the area, they came across police controls in which officers were armed with shotguns and assault rifles.
"There were armored vehicles, SWAT special forces vehicles, ambulances, and police cars that occupied at least half a mile," Baggett said.
Witnesses said they saw multiple victims and dozens of ambulances near the concert venue. Some of the attendants crowded later in the basement of the nearby Tropicana hotel-casino.
Agents armed with assault rifles entered the Mandalay Bay Hotel and Casino.
Authorities closed part of the central Las Vegas Boulevard and Interstate 15.
McCarran International Airport flights were temporarily suspended for the incident, the aerodrome said in its official Twitter account.
White House spokeswoman Sarah Huckabee Sanders said President Donald Trump "has been informed of the horrific tragedy in Las Vegas."
"We are monitoring the situation closely and offer our full support to local and state authorities. We pray for all those affected. "
President Trump sent a tuit saying that "I extend my deepest condolences to the victims and families of the terrible shooting in Las Vegas. God bless you!"