Las Vegas police said Monday that suspected shooter Stephen Paddock appears to have committed suicide before federal agents broke into his hotel room, according to a statement.

"Las Vegas Metropolitan Police Department identified the lone suspect involved in the latenight mass shooting on the Las Vegas Strip as 64-year-old, Stephen Craig Paddock, a white male from Mesquite, Nevada," the statement read. "Paddock opened fire on a crowd of more than 22,000 concert-goers from his hotel room on the 32nd floor of the Mandalay Bay Hotel on Sunday evening at approximately 10:08 p.m."

"The victims were across the street attending the Route 91 Harvest Festival concert when bullets rang out. LVMPD SWAT responded to the call, breached the hotel room and found the suspect dead," the police department said.

Media reports initially said Paddock was killed when the SWAT team entered his hotel room.

Clark County Sheriff Joseph Lombardo said 10 rifles were found in Paddock's room.

The Clark County Fire Department reported 406 people were transported to local hospitals and at least 50 people have died as a result of the attack.

Police believe Paddock was the only shooter, and carried out the shooting from the room. Officials were investigating the incident, but have not called it a terror attack.

Paddock, 64, resided at a retirement center in Mesquite, Nev., with 62-year-old Marilou Danley.

By 3:30 a.m. PST Monday, police said they were "confident, but not 100 percent sure" they had located Danley.