List: The deadliest mass shootings in U.S. history

(Top) A candlelight vigil following the shootings on the Virginia Tech campus in Blacksburg, Va., on April 17, 2007. (Left) Blacksburg police officers run from Norris Hall on the Virginia Tech campus in Blacksburg on April 16, 2007. (Right) A Virginia Tech student stands by a cardboard "VT" that was part of a makeshift vigil placed on a drill field at Virginia Tech on April 17, 2007.
Charles Dharapak; Matt Gentry/The Roanoke Times; Casey Templeton

1. Pulse Orlando nightclub in Orlando, Fla. (June 12, 2016)

Police say 29-year-old Omar Mateen opened fire at the club that calls itself the city's hottest gay bar. He took hostages, and after a three-hour standoff, police moved in. The gunman was killed, but not before perpetrating the deadliest mass shooting in recent United States history.

At least 49 people were killed, and more than 50 were wounded and taken to area hospitals. Mateen was killed during a firefight with police.

2. Virginia Tech in Blacksburg, Va. (April 16, 2007)

Seung-Hui Cho, a 23-year-old English major from Centerville, Va., entered the campus of Virginia Tech and opened fire.

Thirty-two people were killed, and 17 others were injured. Cho also killed himself.

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3. Sandy Hook Elementary School in Newtown, Conn. (Dec. 14, 2012)

Adam Lanza went into Sandy Hook Elementary and killed 26 people — mostly children — before killing himself. He also killed his mother, Nancy Lanza.

4. Luby's Cafeteria in Killeen, Texas (Oct. 16, 1991)

In 1991, 35-year-old George Hennard walked into a cafeteria and opened fire with a handgun. He loaded and emptied his gun several times, leaving 23 people dead. Then he killed himself.

(Left) A victim is led away by police as SWAT officers assist the wounded at a McDonald's restaurant on July 18, 1984, in San Ysidro, Calif. The gunman killed 21 people. (Top) People peer through the fence around the restaurant. (Bottom) Mourners console each other in the parking lot of Our Lady of Mount Carmel Catholic Church in San Ysidro following funeral services for several victims.
Lenny Ignelzi (2); David Longstreath

5. McDonald's restaurant in San Ysidro, Calif. (July 18, 1984)

James Oliver Huberty, a 41-year-old unemployed security guard, opened fire on a McDonald's in San Ysidro using a shotgun and a pistol.

He killed 21 people and wounded 19. He was killed by police.

6. University of Texas Tower in Austin, Texas (Aug. 1, 1966)

Charles Whitman, a 25-year-old student who had served with the Marines, murdered his mother and his wife before climbing the University of Texas Tower with six firearms. He began firing at pedestrians below.

He killed 14 people and wounded 31 from the tower. He was killed by police.

(Left) A boy looks through the fence at the Columbine High School tennis courts in Littleton, Colo., in April, 1999. (Right) From left, Rachel Ruth, Rhianna Cheek and Mandi Annibel, all 16-year-old sophomores at Heritage High School in Littleton, console each other during a vigil service in Denver's Civic Center Park. (Bottom) An aerial view of the news media compound near Columbine High School.
Eric Gay; Laura Rauch; Ed Andrieski

7. Columbine High School in Littleton, Colo. (April 20, 1999)

Eric Harris and Dylan Klebold, students at Columbine High School, entered the school with four guns and pipe bombs.

They killed 13 people and wounded 24, before killing themselves.

8. Edmond Post Office in Edmond, Okla. (Aug. 20, 1986)

Patrick Henry Sherrill shot and killed 14 co-workers before taking his own life.

Photographs of victims of the terrorist attack on the Inland Regional Center are seen as people hold candles while attending a vigil at the San Bernardino County Board of Supervisors headquarters to remember those injured and killed during the shooting on Dec. 7, 2015, in San Bernardino, Calif.
Joe Raedle

9. Inland Regional Center in San Bernardino, Calif. (Dec. 2, 2015)

Syed Farook, 28, and Tashfeen Malik, 27, opened fire inside the Inland Regional Center in San Bernardino.

They killed 14 people, and they were killed during a shootout with police.

10. American Civic Association, Binghamton, N.Y. (April 3, 2009)

Jiverly Wong, a 42-year-old Vietnamese immigrant, opened fire on an immigration center in Binghamton, N.Y.

Wong killed 13 people and wounded four others before killing himself.

11. Fort Hood in Texas (Nov. 5, 2009)

Maj. Nidal Malik Hasan, an Army psychiatrist, opened fire using two handguns at the U.S. Army post in Texas.

He killed 13 people and wounded 30. Hasan was sentenced to death in 2013.

12. Washington Navy Yard in Washington, D.C. (Sept. 16, 2013)

Aaron Alexis, a 34-year-old former Navy reservist, opened fire at the Navy Yard. He killed 12 people before police killed him. Editor's note: We've updated the headline and text to reflect that the Orlando attack represents the deadliest mass shooting in modern U.S. history, rather than in all of U.S. history. You can read more about our thinking here. Copyright 2019 NPR. To see more, visit https://www.npr.org.