This article originally appeared on Time.
The suspected gunman during a mass shooting at a Las Vegas music festival has been identified by authorities as Stephen Paddock.
The 64-year-old gunman fired from a Las Vegas hotel onto the outdoor Route 91 Harvest country music festival, which was taking place across the road from the Mandalay Bay Resort and Casino on the famous Las Vegas Strip.
More than 50 people were killed and at least 400 were injured when a gunman opened fire at a country music festival, making it the deadliest shooting in modern U.S. history. Authorities said SWAT teams found the suspect dead in a hotel room with around 10 guns.
Here’s what to know about Paddock:
Who is Stephen Paddock?
Sheriff Joseph Lombardo identified the suspect as Stephen Paddock, aged 64. According to NBC, Paddock is from Mesquite, Nevada, around 80 miles northeast of Las Vegas. Police believe Paddock killed himself before police entered his hotel room.
The suspect had been staying in the hotel room since Sept. 28, Lombardo told the media on Monday morning. “I have no idea whether he prevented the house keepers from entering the room or not. That is a matter for continued investigation,” he said.
Paddock had been known to local law enforcement but not federal authorities. “We believe it’s a solo actor. A lone wolf,” Lombardo said.
Police are looking for a 2017 Hyundai Tucson with a Nevada license plate: 114B40.
Paddock had been travelling with a female companion, who police initially said they were looking for early Monday morning. Lombardo identified the woman as Marilou Danley and described her as an Asian female, 4 foot and 11 inches tall. After locating her, the police said in a statement that she was not longer sought as a person of interest.
“LVMPD detectives have made contact with her and do not believe she is involved with the shooting on the strip,” the Police Department said in a statement seen by CNN.
Newspaper The Australian said Danley was an Australian passport holder, possibly of Indonesian descent, but officials there have not confirmed her nationality.
The pair reportedly lived in a Mesquite retirement community and Paddock was the manager of the apartment complex, Fox News reports. Authorities have yet to confirm this.
What weapons did Stephen Paddock have?
Authorities found at least 10 rifles in Paddock’s hotel room, police said. Recordings and reports of the attack suggest the suspect was using an automatic weapon. Some witnesses said they heard gunfire for at least five minutes, according to the Associated Press.
What was Stephen Paddock’s motive?
The sheriff provided no further details on Paddock’s motives. “We have to establish what his motivation is first” Lombardo said on Monday morning. “There is motiving factors associated with terrorism other than a distraught person just intending to cause mass casualty. Before we label with that it will be a matter of process.”