Las Vegas Strip Shooting

More than 50 people were killed and 200 others injured when a gunman opened fire Sunday on people attending a country music festival in Las Vegas, police said.

It is the worst mass shooting in modern U.S. history.

“Right now we believe it’s a solo act, a lone wolf attacker,” Sheriff Joe Lombardo of Las Vegas Police said. “We are pretty confident there is no longer a threat.”

Authorities shut down part of the Las Vegas Strip and Interstate 15 after receiving reports of an active shooter at the Route 91 Harvest festival, near the Mandalay Bay Casino, at about 10:10 p.m. local time.

Authorities ruled out terrorism, NPR reported.

The White House said President Trump “has been briefed on the horrific tragedy in Las Vegas.”

“We are monitoring the situation closely and offer our full support to state and local officials. All of those affected are in our thoughts and prayers,” White House press secretary Sarah Sanders said in a statement.

“My warmest condolences and sympathies to the victims and families of the terrible Las Vegas shooting. God bless you!” Trump tweeted.

Lombardo confirmed at a news conference that the shooter had fired from the 32nd floor of the Mandalay Bay. He said officers responded and the suspect was dead. Numerous firearms were found in the room at the scene.

He named the suspect as Stephen Paddock, 64, a resident of Mesquite, Nev., a city 80 miles northwest of Las Vegas.