• Editor's note: This article is updated each time new information becomes available.
LAS VEGAS - More than 50 people were killed and over 200 wounded when a gunman went on a shooting spree on the famous Las Vegas Strip late on Sunday, police and US media reports said.
"We have in excess of 200-plus injured and excess of 20-plus that have died at this point," Las Vegas Metro Police Sheriff Joseph Lombardo told a press conference.
The gunman, who was a local man, was killed after police "engaged the suspect," Lombardo told reporters.
Police said that the shooter was taken "down" after officers swarmed over the famous boulevard following reports of multiple shots being fired from the Mandalay Bay casino resort towards thousands of fans at a country music concert.
"At this time we do have a suspect down," Las Vegas police officer Steve Gomez told reporters, without elaborating.
"We have numerous victims right now," he added.
While police did not immediately give a figure for the number of dead, CNN reported that at least two people had been killed. Several local news outlets put the number of injured at up to 24.
Pictures taken at the scene showed revelers cowering in the street or running in terror, as well what appeared to be several bodies lying prone on the ground.
A local hospital was taking in "several" people with gunshot wounds, University Medical Center spokeswoman Danita Cohen told the local Sun newspaper.
Video footage circulating on social media showed a large crowd enjoying a concert as part of the Route 91 country music festival just outside the casino before what sounded like volleys of automatic gunfire halted the performance.
"We heard (what) sounded like a glass breaking, so you looked around to see what's going on and then heard a pop, pop, pop," Monique Dekerf told CNN.
"You'd think for a moment okay we're fine, there's no more gunfire, then it starts again."
Her sister said it sounded like "the shots were coming from the right side ... it sounded like they were right beside us too ... it was right there."
A witness told local TV news station KLAS that he saw someone several stories high firing hundreds of shots into a crowd of people.
Police however denied reports of multiple shooters.
"At this time we do not believe there are any more shooters," the department wrote on Twitter.