Officials in Las Vegas say at least 50 people were killed and more than 400 were taken to hospital after a shooting at an outdoor music festival.

That makes it the deadliest mass shooting in modern U-S history.

Authorities say the shooter, a Las Vegas resident identified as 64-year-old Stephen Paddock, has been killed.

They believe it was a so-called “lone wolf” attack.

Country music star Jason Aldean was in the middle of a performance at the Route 91 Harvest Music Festival when machine gun fire rained down from a nearby hotel.

He says he and his crew are safe.

Aldean took to social media hours after the attack, calling the incident “beyond horrific.”

U.S. President Donald Trump is extending condolences to the victims of the shooting in Las Vegas and their families.

In a tweet Monday, Trump offered “My warmest condolences and sympathies to the victims and families of the terrible Las Vegas shooting. God bless you!”

White House spokeswoman Sarah Huckabee Sanders said Trump was “briefed on the horrific tragedy in Las Vegas.”

(The Canadian Press)

PHOTO: People assist a wounded woman at the Tropicana during an active shooter situation on the Las Vegas Strip in Las Vegas Sunday, Oct. 1, 2017. (Chase Stevens/Las Vegas Review-Journal via AP)