Fox News host Shep Smith took to the air Wednesday to read off a lengthy list of fatal school shootings in the U.S. since the 1999 attack at Columbine High School in Colorado.

"Since Columbine in 1999, there have been 25 fatal, active school shooting incidents at elementary and high schools in America," Smith said, before ticking off a list of shootings that spanned nearly two decades.

The most recent school shooting on that list took place Wednesday at Marjory Stoneman Douglas High School in Parkland, Fla.

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Seventeen people were killed in the shooting, according to the Broward County Sheriff's Office. It was not immediately clear how many people may have been injured in the attack.

Police took the suspect, a former student at the school, into custody on Wednesday afternoon.

Smith's list encompassed only fatal school shootings. Everytown for Gun Safety, a gun-control advocacy group, estimates that there have been 18 school shootings in the first month-and-a-half of 2018.

Updated at 6:45 p.m.