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Investigators load bodies from the scene of a mass shooting at a music festival near the Mandalay Bay resort and casino on the Las Vegas Strip. Photo: Chris Carlson / AP

Police say Stephen Paddock had about 23 firearms in his room at the Mandalay Bay Hotel, including handguns, hundreds of rounds of ammunition and at least 10 rifles, several of which had scopes.

They included high-powered rifles that are capable of penetrating police armor and a modified bump stock rifle, which allows a gun to simulate rapid automatic gunfire.

Paddock also had in his Mesquite, Nevada home, per Sheriff Joseph Lombardo:

  • 19 additional firearms
  • Explosives
  • Thousands of rounds of ammo
  • "Electronic devices," which Lombardo would not describe

Ammonium nitrate, a fertilizer that can be used in explosives, was also found in Paddock's car.

Why it might take a while to know exactly which weapons he used: The gun-tracing system in the U.S. relies on paper records, and even microfilm. The Bureau of Alcohol, Tobacco, Firearms and Explosives said it is conducting an "urgent trace on firearms" from the scene.

  • Two gun stores in Nevada where Paddock had made purchases in the last year said he passed the required background checks, per NBC News. It wasn't immediately clear if the guns he bought from these two stores were used in the massacre Sunday night, and while one store revealed he bought a rifle and a shotgun, the other store declined to share details about the sale.

These numbers have been updated to reflect the most recent count, per AP reporting

Go deeper

Texas AG sues Biden administration over deportation freeze

Texas Attorney General Ken Paxton speaks to members of the media in 2016. Photo: Alex Wong/Getty Images

Texas Attorney General Ken Paxton is suing the Biden administration in federal district court over its 100-day freeze on deporting unauthorized immigrants, and he's asking for a temporary restraining order.

Between the lines: The freeze went into effect Friday, temporarily halting most immigration enforcement in the U.S. In the lawsuit, Paxton claims the move "violates the U.S. Constitution, federal immigration and administrative law, and a contractual agreement between Texas" and the Department of Homeland Security.

Dan Primack, author of Pro Rata
1 hour ago - Podcasts

Carbon Health's CEO on unsticking the vaccine bottleneck

President Biden has said that getting Americans vaccinated for COVID-19 is his administration’s top priority given an initial rollout plagued by organizational, logistical and technical glitches.

Axios Re:Cap digs into the bottlenecks and how to unclog them with Carbon Health chief executive Eren Bali, whose company recently began helping to manage vaccinations in Los Angeles.