A look at some of the deadliest U.S. school shootings

In the deadliest attack in a decade, a teen gunman opened fire on May 24 at a Texas elementary school, killing at least 19 children

There have been dozens of shootings and other attacks in the United States schools and colleges over the years, but until the massacre at Colorado's Columbine High School in 1999, the number of dead tended to be in the single digits. Since then, the number of shootings that included schools and killed 10 or more people has mounted. The most recent two were both in Texas.

ROBB ELEMENTARY SCHOOL, May 2022

An 18-year-old gunman opened fire on Tuesday at an elementary school in Uvalde, Texas, killing 19 children and two adults, officials said. The 18-year-old attacker was killed by law enforcement.

SANTA FE HIGH SCHOOL, May 2018

A 17-year-old opened fire at a Houston-area high school, killing 10 people, most of them students, authorities said. The suspect has been charged with murder.

MARJORY STONEMAN DOUGLAS HIGH SCHOOL, February 2018

An attack left 14 students and three staff members dead at the school in Parkland, Florida, and injured many others. The 20-year-old suspect was charged with murder.