Updated 9:41 am:
Reports from the Las Vegas Police Department have upped the number of injured to over 400.
When Police had finally entered the shooter's room they found at least 10 rifles in the room and the shooter had died from a self-inflicted gun shot.
Original story continues below
At least 50 people were killed and more than 200 injured in a shooting outside the Mandalay Bay Resort on the Las Vegas Strip during a music festival on Sunday night. It is the deadliest mass shooting in US history. Shots were fired from the 32nd floor of the resort, according to police. Country singer Jason Aldean was performing at the time.
Las Vegas Metropolitan Police Sherif Joseph Lombardo named the suspect as 64-year-old Stephen Paddock. Described as a "local resident," the suspected shooter has been killed. Lombardo said police have tracked down Paddock's female companion, Marilou Danley.
BREAKING NEWS: At least 50 dead, 200 injured in Las Vegas shooting, police say https://t.co/QvbUqOla58 https://t.co/rZ8cS6H9YB
Famous names from the entertainment world have been tweeting of their shock at the deadly attack on a country music festival in Las Vegas.
Mariah Carey, who staged a lengthy residency at Caesars Palace in Las Vegas, said she was thinking of all those caught up in the shooting:
Horrified to hear about the shooting in #LasVegas. My thoughts are with the victims and their families. Praying for everyone's safety.
Fellow star Celine Dion, who is in the middle of a series of shows at Caesars Palace, offered her prayers for the victims and those who had lost loved ones:
Praying for all the innocent victims and their families in Las Vegas - Céline xx... #LasVegas
The Governor of Nevada, Brian Sandoval, has used Twitter to send his condolences to all those affected by the shooting:
A tragic & heinous act of violence has shaken the #Nevada family. Our prayers are w/ the victims & all affected by this act of cowardice.
Las Vegas Metro Police Sheriff Joseph Lombardo says friends and family members who are concerned about the whereabouts and condition of concertgoers can call 1-866-535-5654.
Lombardo described the shooting as a "tragic incident and one that we have never experienced in this valley."
He sent his condolences to the families of those who have lost their lives and said that he would make it "as easy as possible to get information."
For families looking to locate missing loved ones, please call 1-866-535-5654.