UVALDE, Texas (KXAN) — Fourteen children and a teacher were killed in a mass shooting at Robb Elementary School in Uvalde Tuesday, in what Gov. Greg Abbott later called a “horrific tragedy.”

“What happened in Uvalde is a horrific tragedy that cannot be tolerated in the state of Texas,” Abbott said.

Uvalde reported an active shooter situation at the elementary school shortly before noon Tuesday. During a press conference later that afternoon, Abbott identified the shooter as 18-year-old Salvador Ramos, who is believed to have been killed by responding officers.

U.S. Sen. Ted Cruz, R-Texas, called the mass casualty event a “horrific shooting” and commended efforts from law enforcement personnel who responded to the scene.

“Heidi & I are fervently lifting up in prayer the children and families in the horrific shooting in Uvalde,” Cruz said in a tweet. “We are in close contact with local officials, but the precise details are still unfolding. Thank you to heroic law enforcement & first responders for acting so swiftly.”

Democratic gubernatorial candidate Beto O’Rourke, said “our broken hearts are with Uvalde” in a tweet Tuesday afternoon.

Nationally, United States Press Secretary Karine Jean-Pierre confirmed President Joe Biden has been briefed on the “horrific news” of the shooting and will continue to receive updates as they are made available.

Senator John Cornyn also released a statement saying, “the shooting at Robb Elementary School in Uvalde is every parent and teacher’s worst nightmare. No parent, child, or teacher should ever have to wonder whether it’s safe to go to school. This is an excruciatingly difficult time for the tight-knit Uvalde community and for all Texans as we mourn this terrible tragedy. My heart goes out to those in the hospital receiving care and to the loved ones of those who lost their lives. As a parent, the pain they must be feeling is unimaginable. I am in touch with local officials in Uvalde and will continue to monitor the situation. I’m grateful to law enforcement and everyone who worked to stop the shooter and to the medical staff working now to prevent further loss of life.”